So I'm trying to post a trade for buying quicksell unusuals and australiums, and no matter how I do it, it tells me "one of the attributes specified was invalid." Every time I select unusual or australium when adding the item. I have tried adding the quality to the "Wildcard" item, "TF2 Offers" item, and even specific hats. It doesn't matter if I select a paint, exterior, or unusual effect, it gives me this EVERY TIME. I have restarted my browser, computer, and Steam multiple times. Help?