1/2 Live. Weak or prudent?

[feelixthegreek]

1/2 Live NL

Six way limped pot. I have 87o on the button and am 250BB deep.

Flop is Th9s6h. (Pot $12)

Checked to me. I bet $10 and get 3 callers, one of whom is villain who has me covered and whom I've never played with before.

Turn is Qc. (Pot $52)

Checked to me. I bet $50. 1 call, 1 fold, then villain c/r's and makes it $150. I call. SB folds.

River is a brick. Villain checks to me. I check behind.