[alexiskai]

Reasons it's hard to answer this question:

1. We only have a record of asking prices, not the price that clears the market. If you're tracking sales of stuff on eBay, or houses, or auctioned art, you know what the item actually sold for. Even for normal used cars, there are sales at dealers that get tracked by KBB and other industry analysts. These cars trade OTC.

2. Most buyers and sellers trade very infrequently, so they're not applying lessons learned from the last trade to the next one.

3. The markets are fragmented. Most trades are local or regional.

4. The cars are not commodities. Valuation varies based on the buyer's specific needs and the unique condition of the vehicle.

End result is that the clearing price on a given car might vary by $3000 in either direction depending on where it's for sale, what websites it's on, time of year, who's selling it, etc. Very difficult to identify market trends in that environment.