to me 8 pair with gutshot draw its a bluff... opp makes it clear he has the A , if not 2 pairs or even a made straight, so our outs are 3*8+4*7=7 outs that makes aprox 14% to win or to chop.... and we are reraising couple of times, being behind with so little outs i think its a bluff here.

wouldnt have been better just to call? its a small price to see river, if we hit we're happy, if we dont we lose 50, like this if he doenst hit he loses 200, isnt that a too ig price for 14%? even implied odds dont make a reason for paying 200 to see the river