Got a CD of Madonna autographed. It it real?

The same contains a certificate of authenticity of Walt Disney Attractions Inc/ Buena Vista Films (aparently Buena Vista Films distributed the film Evita). But since Madonna`s autographs are so different I´m confussed.

I bought this cd on MercadoLibre from Argentina (the local e-bay) for a ridiculos price of ARS 200 (around USD 17), that CD was being sold on the same place at ARS 500 but no one even posted questions. Just in case I hit it the buy button but I didn´t pick up the CD yet. What do you think: should I go and purchase that CD or not?

Sometimes in Argentina people dont know what they have. In fact a couple of weeks ago Gino Vanelli came for a concert in Argentina and after that he made an surprisingly and unannounced Meet & Greet for those who bought his merchandise at the entrance of the theater he was performing. As I got my picture with him and he signed some stuff for me, 3 days later I checked on Mercado Libre to see if anyone was selling his stuff autographed and someone was selling one of his old vinyls autographed for the ridiculous price of ARS 80 (the price of a Mc Donald´s combo in Argentina) So I didn´t think twice and purchased it, even tough I got signed my stuff by Vannelli himself, afterwards no one sold his stuff. And the price I paid not even covers the price of the vinyl alone without the signature.

And that was not the first time I got a bargain on MercadoLibre Argentina, but on other different issues. Altough Madonna signature is one of the most expensive´s in the world sometimes people in Argentina sell their stuf for a bargain for economic reasons.

What do you think: should I go and purchase that CD or not?

Thank you