I've got about 300-350 in mine total. 150 for the trike and 150 in the engine rebuild. Not bad considering its in relatively good shape. It needs the clutch redone, I'm going to do a 6 speed gear swap (free since I already have the XR engine), cam and carb swap (again free since I have the parts laying around) and at some point new fenders which will cost around 300. I expect to have around 1000 in it total but thats with it built up how I want it and it should be a solid running machine. In the right area a good looking stock 200x will bring around 1000 or so.
1984 200X bored .040 over, mild port work, K&N filter
Planning on custom exhaust, XR200 carb and cam