If anyone interested, I can desolder chips from cartridges for you, let's say $1 a rom piece
...but I cover the PCB with oil to save the rest of the contacts from the residual solder, so it will be oily and filthy, and I don't have the nerves to clean it
at least not completely, so don't expect me to do it.
...and I leave the cart opening to you too
...AND I won't desolder the rom from a nice game, must be some shitty sport or something.... you know...