I've got some used stuff I'm looking to get rid of cheap. I could literally get you set up with a 4-ball arsenal with the stuff I've got. Here they are:
Ultimate Inferno - single drill, less than 50 games - $40
Dynothane Poseidon Force - Overseas, rare - single drill, less than 50 games - $65
Jigsaw Corner - Plugged and redrilled 1X, some knicks and scratches - $35
Onyx Vibe - single drill, lots of games, can use resurface - $35
Mission 2.0 - X-out due to alignment, rolls great, single drill, low games - $55
Ransom - single drill, low games - $55
Hammer Black Widow Solid Special Edition - I got this from a close friend with Hammer ties. This was a black and orange edition that was never released, at least not in the US. It's reactive, but it's much weaker than the original solid. Awesome looking ball, and it's very good on lighter mediums. Plus, you'll almost certainly be the only person you know to have one! - Make a reasonable offer
300C - Single drill, low games - $55
Razyr - OG (Red/purple), single drill, could use resurface - $35
Let me know if anything interests you. If you buy multiple, I'll discount the price-per-ball a bit.