2nd blindlevel facing minbets... strange hand

[oskar]

€35+5 live. 2nd blindlevel. Eerybody got around the starting stack of 4000.
50/100
I've played very few hands, and people are mocking me. I'm UTG2, 8 or 9 players at the table.
I get JJ and make it 450.
One caller. Didn't strike me as the smart type, but he hasn't made too many stupid plays so far. He's limping a lot though.
Flop comes A92 rainbow.
I check. He bets 100. I make a joke asking another player how much I get on the call. He sais "about 4000 to 1" so I call.
I didn't think raising would accomplish much here since there's no draw out there what so ever.
Turn comes a blank.
I check, he bets 125.
I call.
River A.
I check, he bets 600, I insta-call. Anything less and I might have had to think about it. It was pretty ambitious though. The way he bet it, I can only put him on complete garbage, or maybe a 9, and now he decides to make it 600 for some reason.

I'm still confused with the hand.

[sinister1]

This is usually Ace rag, or a pp lower than yours. With his river bet its almost always Ace rag (and sometimes a boat) because he improved and wants some extra value now. He would likely check or minbet the river with lower pp's so you are not beating anything but a bluff (which is unlikely). Its pretty gross but I think you have to fold the river here.

[oskar]

I really was thinking more about what to do on previous streets. There was no way in hell I was laying this down on the river. Maybe because it's live and... reads might be overrated, but in this case I would have been very surprised if he turned over 3 Aces or a boat. He clearly wasn't a good player, but he did make good sized bets in the previous hands he was involved in.