Seriously, what are the upgrades on this built tank? Put aside that it's already been build for you, what would be the cost for all the upgrades added to the tank if purchased on your own? Tally that up, add the cost of the tank, add maybe $100-$200 for labor, then subtract for usage and age if the seller actually tells you how long it's been owned. If it's beencustomizedpainted and it looksprofessionallydone....then I'd add for artistry.

But, as I said. I wouldn't pay more than 1500 for it, and that's for a tank purposely bought with the intention to sell it. If it's been used,.....yeah, that's the sellers loss, not supposed to be a gain.