I'm not going to debate about if there should be a marketplace or not, if there should be a user account age, or rep limit to allow who can post things for sale. Those things are up to the staff, and whichever way they choose to go, I'll respect it.
What I would like to offer instead is a suggestion, and that suggestions is:
CATEGORIZE THE MARKETPLACE
There should be a sub forum(s) on the marketplace to allow for easy search, and organization. The way it is at the moment, it is a jumbled up mess.
This is an Open Tibia community, and the majority of users here want to find resources for their project they are working on. This becomes a nightmare, when the majority of posts in the marketplace forum, are accounts or gold being sold from real tibia.
So to help people be able to navigator through the marketplace forum better, it needs to have subforms. I would suggest the following subforms:
1. Tibia Characters, Gold, Ingame items - This would be the section to post if you want to sel/buy something that is on a pre-existing server.
2. Scripts (LUA,XML,C++)- This section would be to post singular scripts/systems that you would want to sell/buy.
3. Maps- This section would be for posting maps that you would like to sell/buy.
4. Full Data Packs- This section is for selling a already working/made data pack, with all the necessary files to run a server.
5. Website Applications/Web Resources (PHP scripts, layots, etc)- The section to post web-related products for sale/buy.
6. Other- The section to sell non-tibia related things, bots/tools for tibia, or whatever random thing people want to attempt to sell or buy (example: old ips).
I believe this would help clean up the marketplace to be more userfriendly. as I said before, it is a mess at the moment, and a chore to navigate through it.
I hope my suggestion is taken seriously.