Post longevity in Auction forum

[stokerd]

For most forums, the longevity of a post is about two weeks. However, for the All Auction Links forum, there doesn't seem to be a delete date. This gets very frustrating when doing a search, thinking you've found the perfect item, and the ad is dated in 2013. For example, I recently searched for "Warhound", trying to find an ad I remembered reading lately. There were 66 results; however, only 9 of them occurred in this year.

Would it be possible to delete the posts from this forum if they are older than two weeks? Or even a month? By that time, the auction has ended and they won't keep coming up in searches.