[punter11235]

Assuming that gambler will bet the turn your chances are 1/5.75 to hit. So you need to win : 130*(1/1/5.75) = 130*5.75 = 747. The pot will be 490 with your call so you need implied odds worth 250 to call this.
Now you will have 2street to extract. Even if hes paying of one time in two you should be able to easily extract 500 or more + you have some chances to see cheap river so its easy call imo.

If there is flush draw on the board I would fold because one guy is allin already and you can have problems with extracting if diamond hit and bluffing is pointless.
(EDITED to remove my retarded comment )

Best wishes [img]/images/graemlins/smile.gif[/img]