Grow your own. It's way cheaper. You can get vermaculite and substrate at WalMart for $10, and the mushroom spores are free online. Search for free magic mushroom spores on google. You'll get like 10 websites that are verifiably legitimate. You can also order syringes of your favorite spores for $20 shipped to your door.

Otherwise, shrooms should be the same price as mary. Be careful on doseage. If you take an eighth of heavy shit (Ecuadorian, Golden Teacher, Tazmanain) you may not enjoy it. An eighth is fine for normal strains, but take 2 grams or less of high potency ones.