NLCASH .5/1 - 33 on Q2QQ7 board - Bet how much on river?

[xSCWx]

I'm only a couple hands in against this guy. I know nothing about him except that he likes to min raise his button.

His line here is really strange.

PokerStars Game #12416122589: Hold'em No Limit ($0.50/$1.00) - 2007/10/03 - 14:37:59 (ET)
Table 'Nezarka' 2-max Seat #2 is the button
Seat 1: HanMontana ($87.60 in chips)
Seat 2: xSCWx ($99 in chips)
xSCWx: posts small blind $0.50
HanMontana: posts big blind $1

*** HOLE CARDS ***
Dealt to xSCWx [3[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/diamond.gif[/img]]
xSCWx: raises $2 to $3
HanMontana: calls $2

*** FLOP *** [Q[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/diamond.gif[/img]]
HanMontana: bets $2
xSCWx: raises $5 to $7
HanMontana: calls $5

*** TURN *** [Q[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/diamond.gif[/img]] [Q[img]/images/graemlins/club.gif[/img]]
HanMontana: bets $10
xSCWx: calls $10

*** RIVER *** [Q[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/club.gif[/img]] [7[img]/images/graemlins/diamond.gif[/img]]
HanMontana: checks
xSCWx: bets?

There is definitely value from worse hands that will pay me off, but higher pocket pairs or even the quads are possible.

If you agree with the bet please put how much (I went with $9 here as a random spur of the moment decision), and if you feel this is a check please state why.