Always good to refer new members to the policy documents on sales and purchases. However, with the numbers of these questions now coming up, I'm just wondering if the translation is completely accurate, especially from members who are Russian speakers.
Does he/she want to buy the item, or sell it? Does he/she simply want to know how much it's worth? Cost - Value, Price, Worth, etc. (???). All these, depending on translation, could mean the same thing in another language. Is there any way to check this?