it really depends on where you are and what you mean by hydro.if your talking about green bud from a random strain and some of the *designer* strains the price can be very different. an 1/8 of good green is 50 here, 100 a 1/4, 175 a half, and 300 an oz. something from a well known strain can go for 65-75 an 1/8, sometimes a bit more, 125 a 1/4, 200 a 1/2 and 350 a oz. it can also vary depending on how much bud is flowing in the area, if someone has alot to unload i can usually get better deals. these are all approximate prices of bud in my area so none of it is really set in stone but i figured i'd add my 2 cents