Pretty easy to find an Empire Axe for $350, brand new.
There are already threads like this out there, this is all you need:
If you are looking into used guns, learn about PbN's Buy/Sell/Thread forums
All Guns In Price Range
From $99 and below to $800+. Last updated 2007
Hierarchy of Buying Paintball Stuff v2.0:
Listed what to buy first, and various options. Highly recommended, pretty relevant 
Ultimate Sticky V2:
Lots of links.
Use this forum. Someone else has mostly likely posted the ___ vs ___ thread you were going to post. There are also "best marker" and "first marker" threads.