Product Descriptions and On Page SEO for Volusion Store

Hello, I need some on page SEO work done for my website, which is a paintball volusion store. I am looking for addition of product descriptions for those products that don't have them, improvement of descriptions for other products, and complete on page SEO work (categories, pages, headings, etc.). All descriptions will need to be unique and not copy/paste from other websites (I am not looking to get into copyright battles). Please, DO NOT contact me about backlinking. Please include either the complete amount it will cost, or what you charge per hour and how long you think it will take. Those offering backlink packages or "I will get you ranked" packages, will be ignored. Those posting prices just to come up as lowest bid, knowing they will ask a higher price when we discuss the matter, will be ignored. The new Volusion store located at PaintballCT.com. Currently, all our traffic is driven by adwords but we want to move away from that to organic results with some SEO. Thank you for your time.