If it's badged ISE, it's not made by Hobart. The design is still Hobart's just like on the 21 and 22 series, but if I'm not mistaken, by the time they were putting the ISE badge on these machines, Hobart had already sold the dishwasher line to Whirlpool. It just took Whirlpool until the 23 series launched to make any big changes.
$30 is a great price for an unusual but entirely capable machine like that.