My advice is don't expect to make out in the end by getting a project pin. YOU WILL spend more getting it up to snuff than buying an already working one. Do it if you enjoy projects and don't care about how much you put into them.
Good example, I'm selling a Comet currently I got initially for $350 that was blown out completely.
- New dummy drop target assembly - $40
- New target stickers - $20
- new cycle jump ramp - $70
- Flipper rebuild & new flipper coils - $50
- Paint for airbrush - $25
- Airbrush tips - $25
- 2 cans of spraymax2k clearcoat - $40
- Blue xPin displays - $200
- New MPU - $90 + 7 hrs of work and $30 in parts to repair a busted sys11, recouped $50 by selling the trashed original sys9 board, but threw in some xtra parts to make up for the fact it was in such rough shape, so more like $30 recouped.
- CLR - $10
- Rubber kit - $12
- LEDs - $60
- Incandescent bulbs - $10
- Leg levelers - $8
- Replacement transformer - $50
- Electronics (Caps, diodes, ICs, transistors) $50
- Roll of frisket $25
- other various parts, coil sleeves, nuts, bolts, screws - ???
- spray paint $10
- EPROMs - $10 (I burn these myself).
- god knows what else random stuff that came up I didn't keep track of.
Not counting stuff I already had like tumbler & medium either, metal polish, etc.
100+ hrs work roughly. Works out to $1100+, SOLD IT FOR $750. Yeah, I could have half-assed stuff and made it cheaper, but I do this for myself. I like the feeling of stepping back when it is ll done and saying "WOW, that was a lot of work, but check it out now!". Very satisfying. It still could use more stuff too, like a new corkscrew ramp, but your have to stop somewhere.