50NL donk bet in 3-bet pot

[intheflatfield]

I think monster is def. poss. However, if he had 88 or 77, I would think he would be cking to the pf raiser and then ck raise or float the flop. And if he does have over pair, why bet so little, giving u prop odds to call unless he has pocket overpair / big ace w/ FD

My best guess is that he is trying to set the price on his draw plus overpair or big Ace w/ diamond draw. If you flat call here, I think you are letting him draw on the cheap here. Call not an option here for me R>Fold