I have a used HC500A for sale. Was used for a few months. Has the thermostat bypassed to allow subzero operation. Has been used with Aquacomputer DP Ultra fluid and been kept in a well ventilated area.
Item located in Indianapolis, Indiana USA
$300 + shipping OBO
Just realized unit is a bit dusty. Will clean before shipping, drain of all fluids(obviously), and item will be shipped in a crate most likely unless a driving distance deal can be met.