To the OP: Assuming you have a high quality mask, carbon fiber tank and good force feed loader. With your budget of 300.00, I would skip the "woodsball" or "milsim" marker and pick up either a used mid range or brand new GoG eXTCy or Proto Rail.
Unless you're going for the whole milsim thing.
Buy a legit cheap airball gun similar to those mentioned. We could go over all of the reasons for this such as value, weight, the fact that any of the guns you listed won't sell for a good case of paint resold even in perfect condition, or the fact that you really REALLY want a regulated marker.
If you want a woodsball-feel gun, get a GoG G1...nothing less or cheaper.
Do you want to go down this foolish path only to regret it later and hundreds of dollars poorer? If not, do the right thing the first time. I am sure that if you post your question enough you will get the answer that coincides with your initial reasoning and desires. That does not make it a good idea.