just ask neil bigelow. >> even groig it in a 10,000 square foot warehouse, it is hard to keep up. >> reporter: he rung of the 520 dispensearies in colorado. his shop has 300 members. purchasing pot for upwards of $200 an ounce. >> the new green rush is what everybody is calling it. >> reporter: brian plans to capitalize on a $1.5 billion industry nationwide. this professional cpa doesn't use the drug himself but beliefs the buds hold big business. he is the founder of cannabis saver doc. >> people have been calling us the groupon of marijuana. >> reporter: pot shots pay a monthly subscription fey. >> here's 10% off concentrates. >> reporter: in the past four months since the site went live, he said he's seen 30 stores go