The NBA free agency negotiating window opens at 6 p.m. ET on June 30, and while this class is a little lackluster, there could still potentially be some impact players on the market. Here you'll find our list of top 25 overall possible free agents, which bakes in contractual expectations — meaning value for the money — potential for younger players, risk of decline for older players, a premium on long-range shooters (hey, teams want them!) and injury history. To use an example, you'll find both Khris Middleton and Malcolm Brogdon in the 20s, primarily due to their general lack of availability in recent years. Had they played more, they would have been higher on the list. Without further ado, let's get to it. Free-agent position rankings:Point guards|Shooting guards|Small Forwards|Power forwards