Trade in prices

2018 Mazda3 GT
Found my car for sale online. (It's not difficult to stalk an MS6, since there are only about 40-50 nationwide for sale on And only 5 red 2006's.) I got $3,200 for it as a trade in. It looks like the place that bought it at auction fixed the rust on it (I didn't want to put the $3,000 into it to fix the rust). They've got it listed for $8,500 - about $2K over blue book.

Funny that places tout the Car Fax. Does anybody report accidents to Car Fax? Because I've had accidents with 3 of my cars and they never show up on Car Fax!