2007 RM 250 100% stock bought brand new in mid 2010.  
I'm giving up MX and moving towards Enduro and trail riding (KTM 300 in my sights).  I bought it from a dealer that had it in a crate in August of 2010.  I broke my collar bone and separated my shoulder a month later, after about 10 hours of riding.  This year, I've put 0 hours on the track and maybe 5 hours on the farm (probably less).  
I changed the oil every other ride.  There's the typical small dents on the factory pipe (small) and normal boot scuffs on the frame.  The front fender has a few scratches on it and I replaced the brake lever for a shorter one.  The factory tire still has 75% knobby left on it and the bike runs perfect and is super clean.  It's practically brand new.  I can post a picture if needed, but really all you need to do is look online since mine is bone stock and almost new.  $3,100 OBO, I live in Taylorville, Illinois