Good places to find large used tanks?

[Napoleon I]

I have been planning a significant upgrade to my 60 cube mixed reef to something like a half meter cube. 40 x 40 x 20. I have gotten many quotes and the prices run around $1700 to $2000 for the tank, delivery, starphire front and sides, holes drilled etc...
So I'm on craigslist just browsing and the closest large city to me had at least 6 150gallon plus tanks with stands , hoods, sump, lights all for under $1000.
I wanted to ask if there is other classifieds, web sights etc that are good for finding used , large tanks?

Jeff

 

[Politiceaux]

This forum has a great classified section. You'll be able to see it once you get to 75 (I think?) meaningful posts.

ETA: I planned to go all new until seeing how many large systems were for sale here and on a local forum, often for 1/5 or less of original cost.