i somewhat recently purchased a 55 gal
kit from petsmart, with the hoods, lights, filter, and heater for $150.
my quality's fine, but does yours come with a hood and everything, or just the tank,
remember a hood and light for a tank that big is like $30 each, and of course you'll need a bigger filter and heater, (recently my petsmart dropped the prices of the penguin biofilters (penguin 350 for $40) and a 200 watt heater is say $20.
for what its worth, a 55 gal
starter kit (only 5 gallon less) for $150, you could save yourself $40 for and have almost the same size, and have extra money to buy substrate and fish