most people I know do <total cost to buy all> - <percent, typically 10-25%> whenever I get around to stuff like it, it'll be total cost -25% for recolors, and total cost -10% for set-based items

"Total cost to buy all" doesn't really explain how people come to that figure.

i do 2 packs free

which looks like that comes out to like 1/3 the cost of buying it all

i also add a fat pack only pack so it's more like 3 packs free

just guess a number lol

i do between 25%-50% off buying them all individually, usually. depends on how many there are and such. bigger sets = more discount.

if i had like 8 colors i would price them more than 3 sold individual, that way if they are buying more than 3 chances are they might as well just get the fatpack instead