Assuming I have a brewing stand, a water source, and I buy ingredients from a well known mall... Glass Block, 162 @ 2r/ea, 324r Nether Stalk, 18 @ 1r/ea, 18r Pufferfish, 18 @ 19r/ea, 342r Redstone Dust, 18 @ 3r/ea, 54r Your time, 200r Total, 938r. Or buy them from 4500 @ 918r/DC.