Out of Date Adverts

Is there any way of removing 'well out of date' adverts from the 'Archers Mart' forum. I just looked for some arrows and saw that many eBay adverts have ended more than a month ago. It must consume a lot of data space on the site as well as being very annoying to see an item you find interest in has been ended for more than a month! On the plus side it does give a central forum to look through rather than trawl through irrelevant eBay adverts.