Ideas for Improving Trade Listings and Searches

I have several ideas for improving the functionality of the trade section:

1. allow searching for multiple game titles at once
2. make stores visually distinct from other sorts of trade listings
3. allow users to flag inactive trade threads so they eventually close on their own

These three together would make it much, much easier to find the trade listings that will actually be of use to you. Right now, even with the search feature, one has to look at many pages that aren't of any use to find the trade listings that are. These would do a lot to fix that. Also, I think that at least the latter two ideas would be easy to implement.

Here are the ideas discussed in more detail:

First, it would be really useful to be able to search for multiple games at the same time. I'd like to find somebody that has, for instance, both Portal 2 and Borderlands. Currently it seems I must search for one and then check every listing for the other. It would be much more convenient if logical operators ('and' and 'or') could be used in searches here.

Second, it would be nice if what are essentially stores were somehow marked as such. There are a ton of trade listings that contain almost every Steam game anybody is looking for on their have list and don't standardly accept anything but currency (including keys) in exchange. Now sometimes those stores are exactly what you want, and other times they aren't what you want at all. If there was just some box that could be checked to designate a trade post as a store and store listings were in a slightly different color or some such, then one could tell at a glance which were the useful trade listings. (Sure, perhaps not everyone would check the proper box, but it seems good for the stores too, as they'd be easier to find, and possibly more noticeable by contrast.)

Third, it would be nice if there were some way to flag inactive trade threads. Here's my thought: add a button that people can click to flag a thread as inactive. The button wouldn't immediately do anything. But, after a week from the time the thread was flagged, if there had been no activity its status would be changed to closed. The creator bumping the thread or posting in the thread would count as activity and would remove the flag. Also, closed threads can be reopened, so it wouldn't be permanent. But this would remove some irritating clutter that comes up when one searches for trades: posts from users who haven't been on in months but which keep getting bumped by people looking to trade.