This sale is not mine, but I've seen these pop up on CL a few times now and the price is falling. The owner lists then as "250?" gallons. They look ideal for a large MLT.
Located North of Seattle, WA.
http://seattle.craigslist.org/sno/for/2549037661.html
Located North of Seattle, WA.
http://seattle.craigslist.org/sno/for/2549037661.html