Did you read the rules of what can be sold here? NOTE that many "collectibles" sellers on Etsy list items that are not allowed here (for example, "rare" items that aren't actually 20 years old, modern coins and stamps), so you can't go by what others are listing.
A clue that you are listing items that are not allowed on Etsy is when the item doesn't fit into the categories.
What, exactly, are you trying to list?
https://help.etsy.com/hc/en-us/articles/360024112614-What-Can-I-Sell-on-Etsy?segment=selling
https://www.etsy.com/legal/creativity
