| Domain name | Date | Price | Broker |
| efficientlight.com | September 2007 | $ 28,900.00 USD | AfterNIC/BuyDomains |
| efficientenergy.com | February 2011 | $ 6,000.00 USD | Sedo |
| efficientlighting.com | February 2012 | $ 5,500.00 USD | |
| efficient.ly | July 2018 | $ 5,000.00 USD | Park.io |
| buyenergyefficient.org | June 2008 | $ 4,600.00 USD | NameJet |
| energyefficient.com | July 2012 | $ 3,928.00 USD | NameJet |
| efficientmobile.com | December 2013 | $ 3,000.00 USD | AfterNIC/GoDaddy |
| energyefficientwindows.net | January 2011 | $ 3,000.00 USD | Sedo |
| efficientcloud.com | March 2011 | $ 2,500.00 USD | Sedo |
| getefficient.com | September 2010 | $ 2,200.00 USD | AfterNIC |
| inefficient.com | August 2016 | $ 2,200.00 USD | NameJet auction |
| energyefficient.com | June 2019 | $ 2,024.00 USD | GoDaddy auction |
| efficient-energy.com | February 2011 | $ 2,000.00 USD | Sedo |
| efficientcars.com | December 2008 | $ 2,000.00 USD | Sedo auction |
| efficientgrowth.com | February 2023 | $ 2,000.00 USD | BuyDomains |
| efficientoffice.com | November 2008 | $ 2,000.00 USD | AfterNIC |
| buildefficiently.com | July 2021 | $ 1,688.00 USD | BuyDomains |
| efficientdigital.com | June 2022 | $ 1,688.00 USD | BuyDomains |
| efficienttransport.com | January 2022 | $ 1,100.00 USD | BuyDomains |
| efficient.co.uk | June 2013 | £ 650.00 GBP | DomainLore |
| efficientbuildings.org | December 2019 | $ 845.00 USD | GoDaddy auction |
| efficient.org | January 2019 | $ 781.00 USD | NameJet auction |
| efficientfarming.com | August 2021 | $ 709.00 USD | GoDaddy auction |
| efficient.net | January 2019 | $ 570.00 USD | NameJet auction |
| simplyefficient.com | April 2021 | $ 566.00 USD | GoDaddy auction |
|
| taxefficient.com | February 2020 | $ 520.00 USD | GoDaddy auction |
| buildefficient.com | April 2023 | $ 492.00 USD | GoDaddy auction |
| efficientworld.com | July 2023 | $ 448.00 USD | GoDaddy auction |
| efficientdata.com | August 2020 | $ 375.00 USD | GoDaddy auction |
| efficienttransportation.com | November 2021 | $ 306.00 USD | GoDaddy auction |
| efficientia.com | March 2020 | $ 292.00 USD | GoDaddy auction |
| efficientauto.com | April 2023 | $ 255.00 USD | GoDaddy auction |
| efficientinteriors.com | December 2020 | $ 223.00 USD | GoDaddy auction |
| innovateefficiently.com | January 2015 | $ 205.00 USD | GoDaddy |
| globalefficientenergy.com | December 2018 | $ 204.00 USD | GoDaddy auction |
| energyefficienthomearticles.com | June 2019 | $ 155.00 USD | GoDaddy auction |
| efficientcomputing.com | July 2021 | $ 152.00 USD | GoDaddy auction |
| theefficient.com | July 2018 | $ 146.00 USD | GoDaddy auction |
| efficientmarketing.com | July 2023 | $ 140.00 USD | GoDaddy auction |
| efficientparenting.com | January 2022 | $ 138.00 USD | GoDaddy auction |
| efficientcars.com | July 2014 | $ 136.00 USD | GoDaddy |
| efficientresults.com | June 2019 | $ 135.00 USD | GoDaddy auction |
| efficientreading.com | July 2021 | $ 131.00 USD | GoDaddy auction |
| resourceefficient.com | March 2021 | $ 125.00 USD | GoDaddy auction |
| energyefficienthouse.com | January 2020 | $ 117.00 USD | GoDaddy auction |
| efficient.io | August 2014 | $ 99.00 USD | Park.io |
| efficient.me | March 2016 | $ 99.00 USD | Park.io |
| energyefficient.io | March 2022 | $ 99.00 USD | Park.io |
| efficienthouse.com | August 2018 | $ 95.00 USD | GoDaddy auction |
| efficientjobs.com | October 2016 | $ 95.00 USD | GoDaddy auction |
|
| efficientplanet.com | December 2016 | $ 93.00 USD | GoDaddy auction |
| homeefficient.com | June 2015 | $ 87.00 USD | GoDaddy |
| efficientschools.com | May 2023 | $ 82.00 USD | GoDaddy auction |
| efficientspace.com | February 2018 | $ 81.00 USD | GoDaddy auction |
| efficientcenter.com | August 2019 | $ 78.00 USD | GoDaddy auction |
| efficientbeauty.com | November 2022 | $ 75.00 USD | GoDaddy auction |
| efficientenergyconcepts.biz | November 2021 | $ 75.00 USD | GoDaddy auction |
| efficientjobs.com | December 2016 | $ 69.00 USD | NameJet auction |
| efficientairconditioning.com | October 2021 | $ 62.00 USD | GoDaddy auction |
| benefficient.com | April 2017 | $ 60.00 USD | GoDaddy auction |
| efficientrestoration.com | October 2017 | $ 60.00 USD | GoDaddy auction |
| energyefficientwindow.com | February 2016 | $ 59.00 USD | Pheenix |
| efficientlight.com | April 2023 | $ 58.00 USD | GoDaddy auction |
| energyefficientdesign.com | March 2021 | $ 55.00 USD | GoDaddy auction |
| energyefficienthomearticles.com | June 2017 | $ 53.00 USD | GoDaddy auction |
| efficienteffect.com | December 2020 | $ 52.00 USD | GoDaddy auction |
| energyefficientstructures.com | January 2019 | $ 49.00 USD | GoDaddy auction |
| efficiently.net | February 2014 | $ 47.00 USD | GoDaddy |
| bitcoinefficient.com | February 2019 | $ 46.00 USD | GoDaddy auction |
| efficientelectricinc.com | September 2018 | $ 46.00 USD | GoDaddy auction |
| efficientoffices.com | April 2020 | $ 42.00 USD | GoDaddy auction |
| energyefficienthomearticles.com | June 2018 | $ 42.00 USD | GoDaddy auction |
| efficientbiotech.com | July 2021 | $ 38.00 USD | GoDaddy auction |
| itefficient.com | March 2022 | $ 32.00 USD | GoDaddy auction |
| efficientholdings.com | April 2019 | $ 30.00 USD | GoDaddy auction |
|
| energyefficientmichigan.com | December 2013 | $ 23.00 USD | GoDaddy |
| efficientcall.fr | August 2016 | € 20.00 EUR | DomRaider |
| efficientlycool.com | May 2022 | $ 22.00 USD | GoDaddy auction |
| efficientrepair.net | December 2021 | $ 22.00 USD | GoDaddy auction |
| efficient.today | August 2021 | $ 21.99 USD | Dynadot |
| efficientworld.com | July 2022 | $ 20.00 USD | GoDaddy auction |
| chromoefficient.com | December 2013 | $ 17.00 USD | GoDaddy |
| efficientarticlemarketing.com | April 2020 | $ 17.00 USD | GoDaddy auction |
| efficientsiteservices.com | August 2018 | $ 17.00 USD | GoDaddy auction |
| efficientsolution.com | November 2013 | $ 17.00 USD | GoDaddy |
| energyefficientpools.com | December 2020 | $ 17.00 USD | GoDaddy auction |
| greenisenergyefficient.com | October 2015 | $ 17.00 USD | GoDaddy auction |
| inefficient.org | August 2019 | $ 17.00 USD | GoDaddy auction |
| inefficiently.com | April 2019 | $ 17.00 USD | GoDaddy auction |
| efficientbenefits.com | January 2019 | $ 15.00 USD | GoDaddy auction |
| efficienthospitals.com | December 2018 | $ 15.00 USD | GoDaddy auction |
| efficientlegal.com | December 2018 | $ 15.00 USD | GoDaddy auction |
| efficientoperator.com | August 2015 | $ 15.00 USD | GoDaddy auction |
| efficienturban.com | July 2017 | $ 15.00 USD | GoDaddy auction |
| gethomeefficient.com | July 2019 | $ 15.00 USD | GoDaddy auction |
| homefficient.com | June 2018 | $ 15.00 USD | GoDaddy auction |
| sinclaircoefficient.com | May 2022 | $ 15.00 USD | GoDaddy auction |
| work-efficientlly.com | October 2022 | $ 15.00 USD | GoDaddy auction |
| efficient.cc | October 2022 | $ 12.99 USD | Dynadot |
| efficientautomobile.com | October 2020 | $ 12.99 USD | Dynadot |
|
Total price amount in this set of 100 domain name sales is 92,900.17 USD; average price is 929.00 USD.
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