My friend's doing a herer grow

I think it's pretty safe for me to talk about this on here. My friend lives in a state close to oklahoma and i'm up in the midwest. She's setting up a soil grow of jack herer. Her friend sold her a 500 watt lamp. She knows some loser dealers that claim could move all (ideally) 500 grams-about a pound. Would it be realistic for her to expect $3500 if she wants to get rid of all 500 at once? I'm trying to advise her to stay away from being an all out seller to several different people. I guess im asking the question.. is 3500 reasonable. I'm not sure how the price goes down with weight. I'm not looking for buyers online, maybe someone can give me some basic info about how wholesale prices work.