Are there any second hand low end markers for sale. I'm interested in Tippmann, Diablos, Spyders, Pirahnas, something along that line. A bit of fun now and then really, i'm not ever going to want to play in tournaments or anything like that but i like to have a laugh with my mates now and then at the local site. So it has to be as easy as anything to maintain and rarely break or have problems. Any ideas...