I'm neither webmeister nor moderator (i.e., take this FWIW), but would this be yet another option to consider? Just quote your original message in a new post, and then you can get into the quoted portion and update the information, prefaced with an explanation. Basically a variation on the "there I fixed it for you" gag. For example.....
THE PRICES IN MY ORIGINAL POST HAVE BEEN MODIFIED BELOW. THANKS, DAWGCATCHING
Originally Posted by dawgcatching
How can I edit an old post? I need to change some prices in my sale thread, but the edit feature doesn't look like it is available at this point. Thanks!
Any gear that DKN wants, 50% off