At the 11s, I'd say A5 and A3 are very possible holdings for the SB here, so I'd be inclined to check the river. If I did value bet, I'd make it a smaller amount. I doubt 88 or 99 is calling a 500 bet here, but maybe 250? JJ or QQ would call 500, but I figure JJ or QQ is raising your flop bet anyway. So I don't see too many hands you're ahead of calling that 500 river. I agree with Bazuul below that the turn raise should be higher, but I think your near 3/4 pot bet on the flop is fine - should price out the gut shot/overcard.