I have a question.?

Hello there. Is it forbidden to sell Facebook Advertising Accounts? 25 $, 20 €, 150TL, 150DKK ....?

You gotta be JrVIP and buy a BST thread.

— Don’t sell —
Newbie members are not allowed to sell on Black Hat World. Full stop.

We want to see you putting time and effort into the forum before you start using and abusing us for cold, hard cash. If you are interested in selling your own services on BHW, these are the ways to do this:

• Upgrade your account to either Jr. VIP or Marketplace Seller membership and create a Marketplace Thread where you can sell your services.
• Upgrade your account to Premium membership and put a link to your service or website in your signature. Jr. VIPs and Marketplace Sellers can also create signatures.
• Contact our advertising support to start promoting through banners and category advertising
• Upgrade your account to Premium, Jr. VIP or Marketplace Seller membership to respond to Want To Buy and Hire A Freelancer requests. You should read the rules for both of these sections here and here respectively.

As you can see, these options aren't really available to you right off the bat. The reason is that we need to see you contributing to BHW in order for us to feel better about letting you use us as a platform for selling your services.
Here's a thread where you can learn more about what you are allowed to do at your member level.