If you want a cheap springer that will allow you to be competitive, go get one of those clear shotties from Walmart. For the price, they're impossible to beat. They're reliable, have good range, and are fairly accurate, especially for CQB. Their magazines hold enough rounds, and you can pump and fire them quickly enough to be competitive in a game.
Spring pistols are shit for gaming and only really useful as a secondary when playing in the cold where GBBs won't work.