600NL two pair river getting checkraised after a checked turn

[Vinetou]

PokerStars No-Limit Hold'em, $6 BB (2 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($661.50)
BB ($672.50)

Preflop: Hero is Button with 8[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">Hero raises to $18</font>, BB calls $12.

Flop: ($36) 2[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets $24</font>, BB calls $24.

Turn: ($84) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero checks.

River: ($84) 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets $72</font>, <font color="#CC3333">BB raises to $300</font>, Hero ????????

Final Pot: $684

We didn't play a lot of hands with villain, one time he checkraised me on turn after my second barrell on ace high board and I folded (I didn't have anything). One time he checked flop IP and raised me on turn, when I called, he shut down and checked river (he had ace high, I had top pair). He seems to be overaggressive, but not stupid overaggressive, a typical player at these levels.

His line here just doesn't make sense. He doesn't have any read on me that I will bet if checked to on turn and river so this can't be a good hand. It just seems like a bluff.

My value bet is thin, but it is a good bet, because people don't believe bet check bet line and I get called by lower pairs so often that I would make that bet with a lone ten (I would probably bet turn in that case, maybe not against this guy because of the previous hand).

However, what do you do on the river? Call or fold?