Could you really?
I know here in PA, in my area (Harrisburg) a 55 gallon along runs $100 with the hood and light, with NO light.
Then the stand is normally another $100+ for cast iron, metal, wood etc.
Then gravel, is well over $2 a bag.
The filters, any decent brand is $30 and over.
Air stones are cheap, the power supply to them are not. They are about $20-$50.
Heaters are around $30.
Now, note that these are all brand new items, and I also agree it's a bit high, but it's cheaper than buying everything brand new. Personally, I bought my 75 gallon tank with everything (matching wood stand, filters etc etc) for $250.
You can find better.