I have been playing alot of 50nl recently and I have seen some insane call downs with 4th pairs, and ace highs and crazy stuff, generally vs fish, but I also have seen pretty ambicious call downs vs 'regulars' as well. Should we be value betting this river? I generally would think so, and if we do then what sort of sizing are we using? I really like the half pot sizing, even a smaller size in my eyes would be fine being that we seldom get check raised bluffed on the river (my personal assumption about 50nl). Should we check here vs decent reg and valuebet vs anyone who we think calls down too light? thoughts? thanks.

btw villian is an 18/12/5 who has folded to 7/11 continuation bets in 400 hands