How much are you betting this river?

[utmt40]

This is a 10+1 at Stars. How much are you betting this river to get a call? Also feel free to comment on all other streets as well.

PokerStars No-Limit Hold'em Tourney, Big Blind is t50 (9 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

saw flop|<font color="#C00000">saw showdown</font>

Button (t1670)
SB (t1555)
BB (t2040)
Hero (t1390)
UTG+1 (t1580)
MP1 (t1410)
MP2 (t1565)
MP3 (t985)
CO (t1305)

Preflop: Hero is UTG with 7/images/graemlins/diamond.gif, 7/images/graemlins/club.gif.
Hero calls t50, <font color="#666666">2 folds</font>, MP2 calls t50, <font color="#666666">3 folds</font>, SB completes, BB checks.

Flop: (t200) 5/images/graemlins/heart.gif, Q/images/graemlins/spade.gif, 7/images/graemlins/heart.gif <font color="#0000FF">(4 players)</font>
SB checks, BB checks, <font color="#CC3333">Hero bets t100</font>, MP2 calls t100, SB folds, BB folds.

Turn: (t400) 6/images/graemlins/diamond.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t350</font>, MP2 calls t350.

River: (t1100) J/images/graemlins/diamond.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero???

MP looks a lot to me like a donk calling with improper odds on a heart draw. I might check this to induce a bluff.

[Isura]

He'll probably call with 1 pair atleast 300, probably 400-500.

[durron597]

He has 1065 left, so we probably want to bet under 532.5 (half his stack). I think betting 350 again is close enough to that number and may provoke a push from a hand we beat since it looks donkish.

[utmt40]

I was pretty sure I was ahead here but I didnt want to look funny betting away half my stack. However, I bet 425 and he folded. Thanks for the insight, I just wanted to make sure I bet correctly.