The phrase "player sales" refers to the act of selling or transferring a player, usually in the context of sports. It means moving a player from one team to another team through a sale or trade. Full definition
Okay, maybe not 100 % with player sales then in the past, but certainly today he does, and you forgot to mention players coming into the club. (justarsenal.com)
The other big clubs seem to make far more in player sales than we've been making in the past few seasons. (justarsenal.com)
I agree, and to add to what you've said, think of the money we've lost out on player sales, and charity contract extensions. (justarsenal.com)