glad to see u got th 360 plax and s1mple. however plague, if u had any issues its always more respectable to discuss it PRIVATELY via pm, and if you feel your being ignored, THEN maybe post in a thread.
honestly though, i always discard the 4 major screws for ease of access to most people who buy the 360 from me, that way they can pop the 360 open easily if they need to make sure the dvd cable is connected, because I am not going to lie.. i have forgotten to plug the dvd sata cable in. but none the less, send me an email with ur address and u some screws will arrive shortly.
and i dont know or see how ur 360 could be as "filthy" as u describe. maybe the CASE itself was a bit dingy, but the inside should be very clean.