Mac Posters

I was reading a forum this afternoon and noticed that someone was looking for some Macintosh merchandise. A few years ago I had picked up a few posters that were left in the teacher's lounge where I was teaching. I was a bit confused as to why they were there since the RPS is a Windows only environment. It didn't matter, though. I picked them up and have hung on to them ever since. Someone sent me a PM on the forum commenting that they are worth quite a bit of money, so I did some poking around. Those five posters are now worth over $300!! Kewl!