You have to watch what you buy off E-Bay because re-casters sell a lot of their **** on there plus you're going to need a suit that fits you. It's best to get a kit and have someone help you put it together to ensure proper fit. Best place to look, if you plan on joining the 501st, is to seek our your local garrison and they should be able to find someone to help you. You can also check out the detachment boards as well. They can also help find someone that can help with painting. The best thing is do a lot of research, be patient, and most importantly have fun with it.
On another note, yes the guy that owns Star Fortress is a child molester, there's many, many posts on Star Fortress on 501st boards and elsewhere.