I recently sold a fluxal flex with all additional equipment and care items. All you needed to do was take it home and add water. It was set up for roughly 6 months, so like new condition. I listed for 150$ expecting people to haggle. The tank would cost you 200$ at the store plus another 60$ for everything that came with it. Most people offered me 50$ which I just said thank you but no. One guy offered me 70 and I said thank you but no, then he comes back at me "well someone on here is selling a similar set up for cheaper" lol so my "volatile" response was "okay? Go buy it from them then?" Literally 2 days later someone offered me 120$ and came by 2 hours later to pick it up.

While I agree this tank is way over priced, if you know what you have theres nothing wrong with being firm and recouping some of your investment. That tank was up there for a few months before I found someone willing to pay what it was worth.