Lost "For Sale" posting

I posted a for sale message over a month ago. Today I edited the message in order to reduce the price, and added a reply to indicate that. I would think the message and the new reply would go to the top of the forum, but it is still buried somewhere on Page 30. What am I doing wrong? Or should I have just deleted the original posting and replace it with a new one? Any suggestion?

The threads in marketplace are ordered by the date they were started. A new post do not bring them to the top.
Please check by yourself the marketplace rules.
If the above mentioned thread is older than four weeks, you can close it and start a new one for the same item(s)
Do not post before 4 weeks. Always close the older thread.

Thanks.

Is there a way to "reuse" the old thread, or at least the photos from it, rather than going back to the photos' source that need to be uploaded again?