There will always be issues, but stock 335's seem to be about average for maintenance. People who mod theirs have had relatively few issues for what can be expected on a turbo car.
If you can't swing a wrench, mabye CPO is worth it. If you can, it almost certainly is not, unless you dont know how to buy a car and end up with a dud.
Hot: 2001 Estoril M Roadster
ZCP 19's, ZHP knob, JL 8W3
Cold: 2002 TiAg M3 6mt
ZCP 19's supersports, ZHP knob, UUC short shift GROM, OEM 18's w310's,
http://absolutehid.ca hid kit