Serge, your english is fine - don't worry about it. I see what the problem is. You should read this section of the site:
First Visit to mu-43.com start here. There the guidelines for posting in certain areas are outlined and more.
Here is the part the explains why you can't post in the Marketplace quite yet. My fault for not remembering!
Please note that the ability to send private messages and email to other members, use the "Thanks" button, or to post new threads in the 'Buy and Sell' area, is limited to those members who have made at least 3 forum posts.
Serge, I suggest that you find another thread/topic that interests you and become involved in the discussion. People will also be more apt to want to trade with someone they've gotten to know a bit more.
After that, you should be able to post in the Marketplace.:smile:
P.S. I'm going to close this thread now since you've now posted in The Marketplace.