buying a GBB (gas Blow Back)???

[Beast]

I have been playing airsoft for close to 4 years now, some think that this isnt much and maybe so, but in that time I have had the greatest pleasure seeing and meeting fantastic, knowledgable people who share this wonderful and often not heard of passion. Now I'm making NO CLAIM whatsoever that I know everything about airsoft, infact most of the info provided below is from what i have copied and pasted over the years in my computer as my own reference, from the many various forums and posts from the net.

[b]I want a cheap GBB, what