$3/$5 NLHE $300 max, California dreaming with the yellow chips

I have just over $300.

Table is kinda tight for live with a couple soft spots. At least one prop and a couple regs at the table.

Loosish guy with about $400 who just lost a pretty big pot (was at over $600) flips 3 chips into the pot. I've seen him raising a fair range and I think he's weak.

Badish, loosish player cold-donks on the button.

I call with A7o from the BB.

~$45 pot

Flop is A K and some other card.
Checked through.

Turn is some other card.
Check, raiser bets $30, button folds, I call after a short pause as to not communicate beating him into the pot.

River is a King.
I check, he reaches then gets this diguested "you win" look on his face and raps the table, I fast-roll my hand like it's the nuts.

The nitty prop player gives me one of those "I though you were one of us" looks. I reply to his unspoken question "I play bad." He laughs, "I play good and I still can't get there."

How'd I do?