The difference in price between complete and partial will be enough to buy that stuff multiple, multiple time.
An incomplete unit is valued only as parts. A complete unit is worth much, much more.
Example, I sold a MAME cabinet at auction recently for $800. I had roughly $300 invested in it.
Had I decided "I really need the buttons, computer and speaker for my next project" it would have promptly sold for $50, maybe $100.
I have seen countless incomplete mame cabinets sell on ebay for nothing (never seen one meet reserve).
You'd be really lucky to get $100 if you gut the dang thing, but I bet you'll get $800+ for it if you take good pictures, show it working and what not.