NL50. Big pot. Three of a kind on river. How much to value bet?

[Haplo]

No info. on villain.

Full Tilt No-Limit Hold'em, $0.50 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP1 ($10)
MP2 ($50)
Hero ($50)
CO ($32)
Button ($48.50)
SB ($47.25)
BB ($49.25)
UTG ($124.55)
UTG+1 ($36.50)

Preflop: Hero is MP3 with 2, 8.
[color=#666666]3 folds</font>, Hero checks, CO calls $0.50, Button calls $0.50, SB completes, BB checks.

Flop: ($2.50) 2, 3, 5 [color=#0000FF](6 players)</font>
SB checks, [color=#CC3333]BB bets $1.85</font>, [color=#CC3333]Hero raises to $5.5</font>, CO folds, Button folds, SB folds, BB calls $3.65.

Turn: ($13.50) 4 [color=#0000FF](3 players)</font>
[color=#CC3333]BB bets $6</font>, Hero calls $6.

River: ($25.50) 2 [color=#0000FF](3 players)</font>
BB checks, [color=#CC3333]

Hero ???? How much do you bet here?
Thanks.

[ship_it_trebek]

Don't post OOP, have a little patience the blinds will come around soon enough. I don't see what hand we beat that is calling this river. If he strangely plays a flush draw like this then he's not calling any bet and I think a bet will be called by only hands beating you.

[Mike Kelley]

Any ace is calling with his straight, but he may not be willing to bet it for fear of a 6 having him beat.

[CalledDownLight]

don't value bet because you're not getting called by worse?