Pictures of the inside..
If it is anything like the used dishwashers generally sold around here, the inside is either so grotty and nasty they should be ashamed to even sell it, or the racks are a hot mess of rust and peeling plastic coating. Either way, sellers around here tend not to show the inside for those reasons, and used dishwasher in good condition are hard to find.
I lucked out and found a vintage Whirlpool built-in, in pristine condition for 20 dollars, as the seller rarely used it, (sick twisted soul that she was, she actually enjoyed hand washing dishes), but had bought a new one anyway when she updated her stove and fridge, so all would match.
My sister was not so lucky, and paid 50 dollars for a middle of the line whirlpool portable just a few years old, but so filthy I wanted to chuck it in the dump. (Filth, stench, grease, roaches, you name it, it was there). She managed to beg and plead until I finally stopped yelling at her for being dumb enough to buy it, dissassembled it, and went to work with full strength brown bottle Lysol concentrate and Ortho bug spray, until it was clean and perfect again.