gaf help: I contacted the seller from that lot again (very nice guy) to double check the games for imperfections (since I am paying quite a lot for the lot). I asked about the pins if there any rusty or brownish on them. He replied that the pins are fine, only the PCB is brownish. He send me a picture (quite burry) but he told me that is not rusty brownish, just brownish. As far I can see from the picture, the PCB seems to be naturally brownish. I quite do not remember if all Genesis games has green pcb boards or they did use other colors. Is there something I should know about PCB conservation? Something that I should be aware and ask the seller? Or they just use PCBs that are naturally in brownish color in the Genesis carts?
Edited: looking online for Genesis carts PCB images, it seems that while the board is green the part with the contacts are white/yellowish clear. Is this brownish thing something I should worry about? Some kind of aging?
Edited: looking around in the web it seems that I am safe. The only concern is the connectors. The PCB colour seems to be whitish/yellowish/brownish in the region of the connectors.