Haven't you guys been watching Pawn Stars? Sheesh, come on. You could just make a pawn shop spawn nearly anything in there and get away with it. Just going to ramble off a big list of pawnables: Fur coats, fur anything really, antique weaponry (cannons and muskets, but also late 1800's rifles, swords were mentioned but don't forget spears, axes, crossbows, bows and arrows, maces, and every other method you can think of people tried to kill each other with before the gun came around), medieval armor (probably a bit silly but dammit I want to play a melee character in full plate!), vintage wine bottles, *special* clothing that's to the player just regular clothing (for instance, shoes worn in a movie, a monogrammed polo shirt that belonged to a famous person, 1800's backpack, ect. these should be mostly junky filler but rarely have gun holsters and fanny packs and maybe even kevlar), expensive cars parked out back if that ever matters, other vehicles too though like RVs and boats, coins and jewelry are nice bits of cash when NPC's are in, vintage books (1st editions, signed copies, or even just special books, I dunno, but people sell books), expensive tools like table saws, and even sciency stuff like those augmentation kits would probably get sold to a pawn shop if they were available to the general public and legal to own and sell. My vision would be a shop that can have almost anything in it like sewing kits and hotplates and whatever other crap that's not really valuable but still sellable. But mostly from a gameplay PoV it would wind up being a crapshoot that might have cool stuff and might be full of top hats and monocles. And I think that's fun, a lot of players like random chance.
Dare I ask, what's the in-world explanation (if any) of why certain zombies became, say, a shocker rather than a boomer or became a spitter rather than a fast zombie or became a hulk but not a brute? Or why any of these guys didn't stay a regular zombie? It's ok if there isn't one, I'm just asking if there is. My bet is that drug use is a factor judging by the rampant drug problem the cities all seem to have. I just wanted to throw this question out there for all to think about.