I enjoy looking at stuff also, and will have seasons where I cannot fly but I still might be looking for some type of part to an engine or hardware for a plane. If it doesn't become a compulsion where you stick yourself with stuff you know you'll never use why not? However, I do know guys that buy stuff and they find their enjoyment in just having stuff; I used to be critical until I found out that their health was in question. Their purchase of something from a swapmeet was their way of staying connected and fulfilled by at least having something to show for a hobby they had grown old with.