If you want the cheapest paintball equipment possible, go to your local big box retailer and purchase a basic pump player's pack. For around $30-$50 you can come out with a plastic pump gun, a mask, a hopper and some 12 gram CO2
canisters. These guns work, but they're slow, not accurate, tend to break paint in the barrel and require you to constantly replace the small 12 gram CO2 canisters. The masks cover your face but they are quite uncomfortable.