Value bet TPTK on river with fourstraight on board?

[Lunkan]

Villain was something like 22/8/2 after about 30 hands.

PokerStars 1/2 Hold'em (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is Button with A[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, UTG+2 calls, <font color="#666666">2 folds</font>, MP3 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, UTG+2 calls, MP3 calls.

Flop: (7.50 SB) 9[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
UTG+2 checks, MP3 checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">UTG+2 raises</font>, MP3 folds, Hero calls.

Turn: (5.75 BB) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+2 checks, <font color="#CC3333">Hero bets</font>, UTG+2 calls.

River: (7.75 BB) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+2 checks, Hero checks.

Final Pot: 7.75 BB

I was considering 3-betting the flop as a free card play, bad idea?

Value bet this river?