I was in Denver to celebrate my annirversary with my wife earlier this year and stopped by 5280. Matt & Gina are the BomB! Really great people and fantastic attitude. Oh, and they have have a few guns for sale too!
Matt and Gina's listed prices are cash prices. If you want to pay with a CC, the price goes up to cover their cost of your convienance. I'm ok with that, it cost alot of money to operate a business. I bought a Savage 111 .338 Lapua for less money ($200.00) with a CC than I would have paid at Sportsman's Warehouse, BPS, of any other big box store. FWIW, I prefer to buy guns at only private shops instead of the "warehouse, small business killers", be that 5280, Bear Arms, or Garretson's.
Kevin