"I can not beat a min raise on the river without the nuts"

Thats a good statement to have taped to your monitor because its true 98% of the time.
However, if you have a read, you can disregard that advice.

$5/$10 NL 6 max. The villain is the worst player I can remember having ever played at $1/$2 NL at prima and now apparently won the lottery and is playing $5/$10

2 limpers, SB completes and I check in the BB with KJ.

Pot $40. Flop J52. SB checks, I bet $30, my fav villain calls

Pot $100. Turn K. I check and villain bets $40. I check raise to $150 villain calls.

Pot $400. River 3 and it completes a backdoor flush. I bet $200 and he min raises to $400. I call and he has 43