My stepdad was asking me today about maybe selling some riva's at a flea market or the mall around here and i was wondering what was the best place to order these...as in, the most non defective stuff..i had ordered from trueman some riva kits and some didnt work...some of the threads on there just wouldnt screw an atty down on it...i want genuine em-riva's. and EM-LR atties...where should i go about getting them?