As @
Bianchigirll wrote, I could possibly break even. But, there is work involved. What I would I end up with is the Suntour RD and the Sugino cranks. I've been down this road before, and you really need to leave some wiggle room to come out ahead on a deal like this.
Yes, I could use the XC Pro RD and cranks. But not sure I have the time right now to do the work involved. (Or maybe I am getting old and lazy) The vintage market for a frame like this in my area is very, very weak. So, frame would have little value;(not sure I could sell it at all.)
I recently finished a purchase like this; ended up with 10 sp Ultegra STI for about $10. But, boy it was a lot of work. Purchase price has to be right; thats the bottom line. At $75 or $80 maybe, maybe.