Another thing I missed in my other post is, you need to know the market and what things are going for. I bought my Full size Vector Uzi off of Sturm. from a guy in Alabama for $3200 back in March. It was the cheapest price I could find at the time for one of them. I got it and now some 10 months later it is worth over $4000. The deals are out there you just have to have the $$ in hand and be ready to jump on them. Even if you do happen to spend a little bit more then it is worth at the time, wait a few years and you will get that back and then some. I take mine out all the time and shoot the crap out of mine, and I let everybody else shoot them. After I get tired of them worst case, I'll at least get my money back out of them.
Zoomer,
If you need any help finding something, let me know and I'll keep an eye out for you.