For new items, 10 to 20 percent off just by asking nicely. Same at most retailers. The "big box" stores can go to 15 percent off easily. G.C. are very strict about used stuff, IMO. They have formulas that they stick to, for the most part. After so many days, the price goes down this much, etc. Only one time ever, I have got them to take an offer on used gear with manager approval, a few days before they were supposed to. It was an amp that had been sitting there for something like 26 or 56 days. It would have been marked down at the 30 day or 60 day mark (I don't remember whether it's 30 or 60). They only agreed to take my offer because I noticed that the insulation on the power cable was broken. I had cash in hand, about to hand it over. But then at the last minute, the guy tells me that the early discount made the sale final, no warranty, no returns or exchanges. I said no thanks; I will just take a chance on waiting four days so I can have a return window. The amp was gone when I came back. The best deals I have ever got are by negotiating down B-stock, floor model, open box, etc. items that are already marked down. You can easily get 15 percent more off of these items, in my experience. I got my Dirt Road Special, one of my Mustang Basses, one of my Jazz Basses, and several other things this way. Really smoking deals, especially if they are B stock in name only (i.e. practically new).