I agree, I doubt there will be many LE machines on the 2nd hand market at all,they will stay in collections for ages.
I think there will be plenty of pros up for grabs 2nd hand, unlike superior stern pro's like SM and IM which are almost impossible to find now.
Spiderman is a fairly common title and pretty easy to find imo
I wouldn't call it a common title at all but yeah they are still around, that is changing though.