My Purchase experiences:
MP5 SD5 from Steve187 = Pickup, no problems
P226, BBs from DEA = 2-3 days in my hands
Propane Adaptor from Airsoft Innovations = 2 days if I remember correctly, no problems
SRC M4 (and many accessories!)- Storeskeeper = Pickup, no problems
UMP - Grim Fandango = Pre-order, awaiting shipment, replies to PM's, nice guy, no problems
M3 Light - Jugglez = 2 days I think, no problems (also in UNC Order because of this)
So far so good, I recommend any of them, always a pleasure to deal with them.