Ice cubes were a one month only item, but they were also relativly easy to get. People still use them for building, but most of the time they ask for 5-10 or more. That might be why you're not having much luck at the auction house. Also, it may depend on what you are offering for. A lot of the rarer items usually require rare items in return. For instance, a seagull hat may require Holiday items, costumes, quest items, or certain magic that is hard to find. Although these aren't necessarily required (depending upon who is auctioning) you would need much more common items to get these, probably into the "exceeding trade limit" area of over 15. Pretty much, getting rare items requires merchanting, which is getting a fair amount of a 1 time item (that is usually costly, such as a costume or bat magic,) waiting until it is no longer on sale (and perhaps then a little while longer than that) and then trading that item for a rare item (or maybe even more than one, depending upon the rarity

.)