OMG!!! BUY IT!!! I love hex tanks. and be it against the "ordained" way of doing things- I have always kept thing OTHER than tetras in all of my tanks- my last hex was 35 or 45, sorry minor detail I forget, but I had a crazy fish: butis butis, a lion head cichlid, severums, Geo. suranemensis, a juvy black doradid, some kind of pleco, and some kind of loach, probably some kind of knife-
for the record, I habitually over stock my tanks, I over flitrate them, and I over feed. My fish are gorgeous, fat and happy, and they sometimes breed. I love hex tanks. On another forum I got flamed for reccommending one to someone, but if it's in your home, the fish are healthy, and the tank is gorgeous, then you are you are your only judge. $100 is a good deal. What you should check out, just to make yourself sure, is what brand tank it is, and how old it is, and how scratched it is. I once got an Oceanic 35g tank and stand for $85.