I've just posted the following in a thread very similair to this one...
You will get a lot of recomendations on here, so best to consider a budget for buying the items you will need to 'walk-on' and play.
The absolute basic equipment you want for tourney ready play is.....
Marker - Ion (£100 used?)
Hopper - Anything that is not gravity fed (Egg?) (£25 used)
Air - Cheapest out their is a PMI 3000psi 0.8litre ally bottle, good for about 500 shots each fill. (£40 used?)
Mask - (£25 used)
Battle pack - (£12 used)
Pots - (£1.50 each)
Squeegee (£4)
Barrel Sock (£5)
Total outlay if all bought used from PGI classifieds... about £200-ish..
Other than paint I think that is all you'd NEED to go play.
With this equipment you should get quite near the 15bps max rate of fire all sites and tourneys should be enforcing.
We all would recomend gloves, trousers, jerseys, head protectors, bottle cover etc, and of course much better much more expensive equipment, but depending on your budget you may want to play for a while first and then buy/upgrade as you get more into it.
Say goodbye to that thing called 'disposable income'..... you'll spend every penny on balling WHEN you get the bug.....
Hope helpful..