Optimum series 1 box sell for $550 even if you land a dual signature you will only just make your money back maybe. Second hand box market is strictly for breakers.One positive is the second hand sellers are not able to search cases , well because there aren’t many for sale . They get the product straight from Select and send it out , but you pay the price for that. Imo it’s open to some disingenuous behaviour when a case is purchased and boxes are sold separately that’s why the boxes are cheaper at times .