How much should I pay for a Macbook Pro 17" 2011

There is one right now in the refurbished store for $1899.

Maybe $1500 for a used one in good shape? Not sure.

 

$1000 the most

 

That's been the same price since it was a current model. Apple doesn't drop their refurb prices for old models.

 

Glossy or antiglare screen? Any warranty/AppleCare?

 

They usually go for £1000-1300 on eBay UK, and around £2000+ for the 'pure' non Lion/Mountain Lion touched models (I find this to be a bit ridiculous.)

Most of them appears to be the glossy model and considering how old they are, finding one with the standard warranty available is hard, as far as I know you can't add AppleCare to a model with expired warranty.

 

In Norway you can still find the last model in box and pay "only" 10000Nkr (900£).