Chelsea and United are both interested in buying the 26 year old Bulgaria international this month, especially now that his agent Emil Dantchev claims the striker wants to quit White Hart Lane.
Ramos said: "The player has a value which is more than what Chelsea paid for Shevchenko. He's a very important player for us and we don't want to sell him. "Everyone has a price but Tottenham don't want to sell the player.
"It's normal for a club to pay that sort of money because there are very few players at his level.
"Of all the players competing in the Champions League at the moment, the only one of that quality who is not there is Berbatov.
"There are very few players like him so people should understand the amount of money being talked about.
"Our intention is not to sell and the final decision rests with the club - that is certainly my message."