OFFROADKARTER's post below led me to a search on my local CL where I found this 2003 M5. With only 39,000 miles one can see why the seller is asking $22,500 (just $400 off NADA price), but it does carry a "reconstructed" title due to a previous rear-end collision.

Is low mileage a trade-off for a previously wrecked M5? You decide.