Classics while old don't really go for a lot, people will have them for crazy prices on e-bay but they never sell, I would say MISB max for Sludge $350 and Silverbolt max $250 which is still a lot more than you paid There are Classics collectors out there of which I used to be one, had heaps MISB MOSC but have since moved them on as I have focused on original G1. They seem to do well in the US as they weren't released there, also if you happen to travel to Japan you might be able to off load them there at a good price.