I might buy a used aquarium - I would be concerned about leakage, but if that were proven to be sound, then I wouldn't have a problem buying used.
I've bought my current stuff new. For my 40 gal
. tank, I was able to get it at Petsmart for half price. It's a Marineland Eclipse 3, so it has built in filtration in the hood, plus lights, etc. In hindsight, I would have probably not opted for built-in filtration, because when my filter died, I had to order the parts online and they took ten days to all arrive. I couldn't do a HOB
with the hood because of the built in filtration system. So, I had to buy a new, regular hood, and a new HOB
filter, blah blah. I wish I had had a knowledgeable aquarist to talk to before purchasing anything! I have made so many mistakes - it's pretty laughable.