I paid 155.00 for a 3/8" 4x8 sheet cut to size for my 75 G from a local supplier, and 72.00 for an uncut sheet of 1/4". Im building a tank and a bio-tower/sump... total cost? Well I guess I needed to get a couple of odds and ends (cement, cement applicator, 150 tooth saw blade) so that would tack on another 30.00. Not bad when you consider that drilled 75 gallon acrylic tanks go for about 350, and sumps (like the one Im building... bio tower with slide out trays and 3 gallons of bio balls) for 200+