I found a used MacBook Pro 15-inch from 2010 with these specs:
Intel Core i5 2.4 GHz
8 GB RAM
Intel HD 3000 graphics
nVidia GT 330M
320 GB HDD
OS X 10.9.2 Mavericks
Those are quite good specs and it's only or $830.
My other choice is a 13-inch MacBook Pro from 2012:
Intel Core i5 2.4 GHz
4 GB RAM
Intel HD 4000 graphics
500 GB HDD
For or $850.
I'll be using the computer for web surfing, movies, music and all that. I would also like to play Minecraft on it. I like the bigger screen of the 15-inch, but I think it might way too outdated, even though Apple still sells i5 MacBooks.
Please, help me decide. Note that I'm not buying a PC, it has to be a Mac.