Going to look at 180 ( 72 x 24 x 24) acrylic tank and stand this Saturday. He's asking $500 but is open to negotiating, also says he has a bunch of accessories as well. I will definitely check out the tank thoroughly, but this would be my first acrylic tank. Anything special to look for? And does the price seem reasonable if it's in good condition, am going to try get the price a bit lower..