I got this one for free:
I also got a parts bike for free too. Couldn't salvage much, but I did need the stator to get the other bike's charging system working:
After sticking about $200 in it for tires, brakes, battery, and getting it registered, it's street legal and very fun. Not as off road capable as I would have liked, but hey, it's 40 years old!
I paid $1400 for this one back in '98. Just sold it a couple of years ago. '86 VT700. Fun bike, but a bit too small for me at 6'5"
My most recent purchase - '94 KTM 620 EXC. Runs great, but I'll have to stick some time and money into it to rebuild the shocks. $1200: