Hey guys, I have an X-7 with a 6-pt collapsible stock, a curved MP5 magazine, and a MP5 foregrip. Only thing is that it's missing a few 1 pin with a spring. I take it apart, oil and clean it very time I play, so internals are perfect. Obviously, it has an E-Grip and it has a, I think, 14 inch barrel, but I need to check on that. What do you guys think I could sell this for? Thanks!