I think the problem a seller and and a buyer wouldn’t go this route for a few reasons. Most sellers don’t have cash laying around, try to include that in the cost of the loan and the lender may balk and the appraisal may not come in anyway.
As a buyer I would prefer the price be lowered as opposed to the loanbought down because you lose flexibility to refi if rates go down, you pay higher taxes and you have a higher payoff if you sell.
I also think the 8.25 rate you are quoting is an exclusionary rate not the lowest available, lenders who don’t want to make loans raise their rate as opposed to shutting off the lights, the 8.25 is just another way to say “were closed.”