Thanks for noticing! It was the intent to have the new mobile site work like the app and remove sold items altogether because of space constraints on the mobile screen compared to all of the room one has to work with on a regular-sized screen, but looks like it was still showing them. I just tweaked it so that they no longer show in the listing of items when you're browsing a category. If an old item happened to be bookmarked I also now have it set to show "sold" on it.
Always appreciate feedback... Stuff just like this helps keep everything in ship-shape. I will of course notice postings on the forums, but in a perfect world the best chance to get things done is usually to send a note through the Contact/Support link just because that's how I organize my "to-do" list for the day. If anyone ever has any other suggestions don't hesitate to drop me a note!