This price is within reason to get involved with the Rays. Miami has been a surprising 16-16 this season, but the Rays are an elite team especially at home. 
The Rays are 14 games above .500 this season. They have won 71 percent of their past 51 home games going back to last year. Tropicana Park is an unusual venue for opposing teams. One reason for this is artificial turf. The Marlins have lost 18 of the last 26 times they've played on astroturf. 
Miami starter righty Pablo Lopez has been surprisingly good this season with a 2.10 ERA. The Rays just saw him six days ago, winning that game, 4-0. The Rays are 19-7 versus righty starters this season.  
Tampa Bay is starting southpaw Josh Fleming. He also has been surprisingly good carrying a 1.74 ERA through his first two big league starts. He pitched against the Marlins last Saturday and held them scoreless on three hits in 5 1/3 innings. Miami is 3-8 versus lefty starters on the year. 
The Rays are 9-2 in their last 11 games. This includes a 3-game road sweep of the Marlins. Tampa Bay outscored Miami, 18-7, in that series.