most likely you can pick up a LCD for cheap that is roughly the same size and all over EBAY are converter boards for about $30 instant Primal RAGE working.. As its a JAMMA cab, you can put most any (jamma) game in it.. many jamma boards are cheap.. Think of it as a giant Nintendo, jamma is just a slot you stick the board in.. think of it like a giant PCI slot.
if its an original Primal RAGE cab, its worth more then $60... (would HAVE RAGE wrote down the sides and the panels on front would all look broken up lava ground.) if its a upgrade( some other cab with the Primal RAGE board stuck in it) you should figure out what the cab was originally. In the back inside should be some paper with a name someplace.. Depending on shape some of the old dedicated are worth some bucks if it wasn't to chopped up to get the Primal rage into it. Keep in mind thre are GENERIC cabs.. with a jamma harness.. no value to those.
If you do mame it. I would suggest making sure the type of cab and such first.. It might be worth selling and getting another cab. otherwise its pretty easy.. I built my own instead of chopping up an old one.. I have a few originals.. CongoBongo, and a Race Driving. If you can pick up and old e8400 and a board that will OC you can play "almost" any game in MAME but a few very specific ones.. some google work and you can buy a 2 gig HD with "everything" all set up for about $200.. you put it in a good PC and just GO.. all the old Laser disc game .. all the old home consoles.. even PSONE and PS2,Dreamcast.. of course that is not legal..
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