Im in the market for a new amp finally. Thinken of the Hartke 120w 2x12in combo, the SWR LA-15 or the Ampeg BA15. Anyway, ive never actually had to deal with a store for my gear so im not quite sure on how to get the best price out of them. Ive been told as a general rule to expect to get $200-$300 off the rrp. It it possible to get more off? What are some good barganing techniques???