You have to put money on his commissary account through Western Union and it gets ordered - which takes a week or so. Black and white is about $100, color is $250-300. They do count against commissary spending but not the entire amount for one month.
https://www.inmateaid.com/ask-the-inmate/my-fiance-was-just-moved-to-arizona-state-prison-phoenix-west-and-wants-to-buy-a-tv-how-much-does-this-cost-and-how-does-he-or-myself-go-about-doing-that-does-that-count-against-his-maximum-spending-for-the-week#answer
Accepted Answer Date Created: March 22,2013