Auction items won't be on sale for EC, neither will guns. Except the new ones they have made for it. Otherwise everyone would spam ec uploads and snk will lose a lot as a manager.
Saber is 100 EC. Gas Gun is 100 As Well. To refund and get either would require at least 200 ECs worth of items if it's at half price refund, as you said. Oh, and i never said half priced. I would want full price. Your opinion of the game wouldn't make it suck as a whole, and therefore, what you said, wouldn't be a problem. The only problems I've really seen people say with refunds is that it would take away from the admins' income, and would likely almost shut the game down.
EC Are Not Sold. They Aren't Part Of The Income Of The Server.