Is this some kind of purgatory for arcades who behaved (really) badly during their life ? 
How did you find that place? it's amazing!
I bought some non-working generic jamma cabs for parts and the seller told me, there is a warehouse not too far from Budapest with tons of cabs.These guys are pinball fans, don't care about arcade stuff, that's why it looks like a cemetery.

Unfortunately I'm totally out of space, the only way to save them is to rent a 200-300 m2 warehouse, but that's 300-400 eur monthly.If there were classic cabs I'm surely did the suicide mission and rent it, but most of these are "too new for my blood" as our great poet said before!

I try to save everything I can(pcbs, marquees, monitors), still waiting for prices.