DoneDeal's latest report has found that in some cases older models have been listed as higher than new ones.
The report highlights a 56 percent rise in inflation since January 2020 until the end of last year.
A lack of supply is being described as one of the biggest contributors.
Head of the AA Paddy Comyn says rising inflation in the car market is likely to continue
"Cars that are under €3,000 euro in value, so cars that anyone starting off at an entry point - their first car - is getting more expensive for those people to get into the car market. Obviously it's good news if you are trading in as you can play a little bit more hard ball against your new car, which of course you're going to wait for"
