Robert/Bob is the name of the friendly older dude in the sw section I think.

I spoke to Ron & said I only wanted to pay $4/lb and we settled on $5/lb.

I think it probably helps with bargaining if they know your face.

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I just got 130lbs from J&L in the last month. Total cycle time was 7 days. The rock was fantastic and looks great. I've had them ship most of my tank equipment as well and have had nothing but good experience after good experience with them.

I would imagine from my experience there the key is to make them think you're gonna walk out unless the give you what you're looking for.
I counted my cash right in fron of him and thats when he offered me a discount and then I asked him for a bigger discount if I bought more than the 30 lbs I first said I was getting, it's all about making them think they are upselling you when in fact you are downselling them....