Yeah, that restriction is such loathsome rubbish. I usually do the 3 queues per day during winter and summer sales to get lots of free cards, then sell them off on the Market to get the funds for the cards I actually want (missing ones from the sets of the games I play). This last sale, couldn't do it - thanks to this nonsense. Couldn't complete a set either, got quadruplicates and triplicates of most cards but didn't get a single specimen of one elusive card. Ended up turning them all into gems - at least they had the decency to not remove them from our inventories when the sale ended and its cards expired. I want to opt out from this "security measure", but just like with many users' request for ability to pay the full price for non-regionlocked games you can gift to friends in ROW even if you're in a heavily discounted region (Asia, RU/CIS), Steam is deaf to what the users actually ask for.Having to price items when posted make it nearly impossible to sale anything with a wait of 15 days.