Guns going OOP, I wouldn't worry too much unless it was something hard to obtain in the first place (limited edition WA handguns and stuff). But for AEGs and stuff, there's more and more companies producing them now, and a wider than ever selection of guns to choose from. Man when I started out, if there were all metal L85s (like the ones STAR are planning to put out) back then... uh... I guess I would have bought one back then instead of now? But you get the idea. :P
Plus what you want may change/evolve over two years.