So while $25 to $40 for an eighth, $100 for a half an ounce, and $200 for an ounce are a good ballpark estimate to begin with, it all depends on where you live and whether you’re purchasing them directly from the source. 21 oct. 2022 · How much do shrooms cost? We analyzed the three different ways acquire shrooms (Buying, Growing, Foraging) and calculated the real cost.