What does "ss" mean when doing a price check?

I've seen many items that say "ss" when I inquire on its price, What does that mean? I just tried to do a search, but searching is currently disabled due to high server volumes. Thanks for your help!!

Screenshot.

Thanks. thats kinda weird. The weapons list I was looking at had prices for most of the items, but instead of a price it had "ss" on a few of them. I thought it meant something else. There wasnt a link to click to see a screen shot or anything.

People have also used it to mean Shop Sell, ie not worth spending time selling, but only in the price check froum, not in auctions...