IM is a super fun, challenging game! I planned on adding one to my collection last year but it gained a lot of hype (which is deserved IMO) and all the used and NIB's dried up.. quick! I know 2 guys that own one that tell me they will never move it (and they know I'm ready with cash in hand if they do).
Speaking of prices, as hard as IM is to find anywhere and the fact that production is long done this one will continue to climb. And unlike SM, there are a lot less IM's out there for sure (Ops were still routing pins back when SM was released).