I replaced my HVAC system a couple years ago and just found brand new filters for the old system that I no longer use as my new HVAC uses a different filter size. Does this forum have a classifieds section or a forum to sell stuff like this? I was about to put the filters on eBay, but figured folks here can probably use them. I didn't want to post anything that may break the rules so please let me know if anything like this is allowed. Thank you.