flopped straight from blind, river bet or cr?

no read - can villain ever call a river bet here, or should i check hoping for a bet?

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

SB ($53.35)
Hero ($48.30)
UTG ($40.60)
UTG+1 ($74.40)
MP1 ($18.75)
MP2 ($51.40)
MP3 ($86.65)
CO ($58.85)
Button ($70.95)

Preflop: Hero is BB with http://www.flopturnriver.com/phpBB2/.../smiles/8h.gif, http://www.flopturnriver.com/phpBB2/.../smiles/th.gif.
UTG calls $0.50, UTG+1 calls $0.50, 6 folds, Hero checks.

Flop: ($1.75) http://www.flopturnriver.com/phpBB2/.../smiles/jh.gif, http://www.flopturnriver.com/phpBB2/.../smiles/7s.gif, http://www.flopturnriver.com/phpBB2/.../smiles/9s.gif (3 players)
Hero bets $1.75, UTG calls $1.75, UTG+1 calls $1.75.

Turn: ($7) http://www.flopturnriver.com/phpBB2/.../smiles/3c.gif (3 players)
Hero bets $7, UTG calls $7, UTG+1 folds.

River: ($21) http://www.flopturnriver.com/phpBB2/.../smiles/4c.gif (2 players)
hero not sure...

check and hope someone wants to bluff at it or thinks you missed your fd.
I dont think you get snap called by much if you lead river large that didnt raise the turn to play big pot on the river.

They check their QJ and J10 here so much it is sickening. Just go for max value I'd say $20 is fine.