The price is ok, not terrible, not a bargain. I would be concerned because the brace on the rear glass is not full length, therefore not full strength bracing. On a 24" tall tank the water pressure is greatest at the top in the middle of the length and there is no strength there. If you were able to do a cross brace at the 3' mark that would make it strong, or get the whole tank flush against the wall, the wall studs would effectively brace the rear glass.
Return pump, lighting, heaters and plumbing is gonna set you back prolly another $300-400 to do it justice.
Just my 2C worth...