Value bet?

Seat 6: GPtime ( $100 )
kingfisher52 posts small blind [$0.50].
CarpetPads posts big blind [$1].
GPtime posts big blind [$1].
** Dealing down cards **
Dealt to Iwindk [ 9h Ac ]
SrixXxon folds.
string32862 folds.
GPtime checks.
Iwindk raises [$4.50].
kingfisher52 calls [$4].
CarpetPads folds.
GPtime calls [$3.50].
** Dealing Flop ** [ As, 5d, Qh ]
kingfisher52 checks.
GPtime checks.
>You have options at Table 95966 (No DP) Table!.
Iwindk bets [$7].
kingfisher52 calls [$7].
GPtime calls [$7].
** Dealing Turn ** [ Qc ]
kingfisher52 checks.
GPtime checks.
Iwindk checks.
** Dealing River ** [ 6s ]
kingfisher52 checks.
GPtime checks.
Iwindk checks.

I can't value bet this river, can I? What do you think of my play?

GPtime just joined the table, no reads on him, kingfisher is more a fish than he is a fisher, pretty loose passive calling station kinda guy. And sorry the HH is so crappy, didn't get all of it in the cut it seems.

i think its fine, you can't be sure you have the best kicker