Hello Ivan,
Maybe you are not aware of it, but the way in which you are trying to sell your Tezro is highly unusual.
That is why you are being asked to include your forum username in the pictures.
You may have read about scams on Ebay, but the risk exists for buyers, not sellers. As a seller, you do not have particular risk - you just don't sell the machine until you receive the payment.
If you are a legitimate seller, I advise that you:
(1) Publish at least 5 pictures of the machine (front side, back side, picture from an angle, picture of any/all accessories, and picture of a working OS)
(2) List the complete contents of your sale in your original post (configuration of the machine, specs, and any accessories you are selling)
(3) Specify whether you are able to sent the machine via carrier services, or only accept pickup in person
(4) You may or may not mention the asking price publicly -- some sellers do, some don't
(5) Then just wait for interest or questions from forum members, and do not insist on members sending you "their private email address"
This is how people usually announce their hardware for sale. You can browse any previous posts in the forum bazaar section to see examples.
Hope it helps.