Magma MK 6 what is it worth?

I have a Magma bullet caster which I believe is a model MK6, from the paper work I have it is roughly 1997 vintage, I have the original manual and such with it and 3 file cabinet drawers full of molds assuming it works as designed any idea what I should ask for this? I'm thinking of listing it on the auction side but have no clue what it may or may not be worth. If pictures help I could upload some but I figure if you know what this is you probably have a general idea of what it might be worth in good shape. Thanks in advance for any info you can spare.