the tank and rock alone would go for about that, but like deuce said, if that is what you want, otherwise, later on you will be saying, i hsould have, for only ...............more, or we should have because, this is ................
but you definitely cannnnot touch that stuff new for 1500$, nto in an acrylic tank, but i would want to see goooooooooooooooood pics of it, acrylic scratches too easily, and another thing i woud do is ask if he eveer used any medications in the tank(probaably not, looking at his inverts, but i woudl still ask)
last, deuce has n extreemly goooood point, how far for you to get it, if you hav eto have it mailed, skip it, the shipping on that would be astronomical, maybe cheaper to get new
HTH and good luck