This should be in the Free Classifieds. It’s like a rule.
It’s more like a guideline - this site has very few hard rules, which is the attraction.
However - you are promoting a personal business, and that usually entails checking in with the website owner - Rick Binn for his guidance on selling - if you plan on bumping up regularly.
He may have guidelines that apply to your posting - not hard thing to do from what I’ve seen.
If you look in the Classified, we have several “established” private vendors that sell here regularly.
But - welcome to the Campfire above all.