I'm raising here for balance and exploitation from his $300 to $1250. (also donking min into this pot is just...dfkgjdfkl)
a) most players realize that alot of players raise donkbets almost by default.
b) hes obviously donking with something(straight draw, flush draw, worse 8, a 6, overpair)....which in this case looks like something he might very well stack off with if hes a recreational player whos tired, had enough, or is just generally not the greatest player.
c) were providing him a shit price to flat with as hes never going to see the river due to the stack:pot ratio on the turn, where the pot will be 3790 and he will have 3725, giving him 2:1 on calling a jam, so hes probably shipping with whatever hes donking with, or calling the turn when he realizes that hes getting 2:1, because he didnt realize it would be like that when he called it on the flop , i dont know if you would have gotten much more value out of him anyways if he were to fold.
you can even raise more on the flop IMO to give yourself a more baller stack:pot on the turn, i think if hes calling hes calling anyways lol, doesnt really matter