Depends on your definition of “decent”. I sold a 2003 M3 with SMG tranny 4 years ago for $5,000. I had bought it 3 years prior at a salvage auction (intending to develop it into an autocross/time trial car. Paid just $8,000–it had been repossessed and the repo driver did not know how to operate an SMG transmission. I managed to talk the guys at the yard into letting me run it through 3 gears and reverse and it acted fine. I drove it for a week to check it out and decided, despite having logged 134,000 miles, it was way superior to my BMW 330CI convertible, and made it my daily driver and sold the 330CI.
It had no mechanical issues and the odometer showed 169,000 miles when I sold it. The exterior and interior were not show quality but not bad either.
Why did I sell it? Was inferior as an autocrosser and time trialer to the Z06 I had before, and my highly modified Alfa Romeo GTV6 3 liter was lapping NOLA Motorsports Park long course 2 seconds faster. It did do well at the Drag n Lap event, thanks to the launch mode.
I do not miss it. I sold the Alfa Romeo about the same time and have regretted that ever since.