I bought one two weeks ago from Walmart for just under $50. The first time I used it I used my old cast iron melting pot and it took 4 melts to convert a 5gal bucket of WW's to ingots. This time I used the 10qt cast iron pot that came with it and and it not only went faster (more surface area on the bottom exposed to the flame?) for each melt, it also only took two melts to convert the second 5gal bucket of WW's to ingots.
Two changes I'll make next time. 1) I am going to get a couple of muffen pans and use those instead of the one RCBS mold that I currently use. 2) I intend to get a differnt ladle, one that I can flatten one side of and that will also hold a bit more then the Rowell (sic) bottom pore ladle that Mr Ferguson sold me for casting bullets. I love the ladle, it's just that it is not the best (nor to be true is it the worst) for casting ingots. Those two changes, by themselfs, should increase production quite a bit.
Now all I have to do is go buy a few more buckets of WW's.
FWIW I figure each bucket produced about 125lb of clean WW ingots.
Grendel