I wish you all the luck in the world and hope you make it.
Your above response is a problem. What is to keep sellers from just dumping garbage through your platform? Vehicles that look good, but maybe have an intermittent issue that is expensive to fix and requires a part that is on National Backorder. There is no recourse for the buyers.
I understand that your rebuttal is "well, they buyer should go look at the vehicle before they buy it". Unfortunately, that is not the way it typically works today. Sure you will find some buyers that will go inspect a vehicle in person if it is close. Many don't have time to do that.
Anyway, something that you may have to address in the future.