After learning where NSEP are targeting their explosion proof models (spinning jet fuel/oil spills out of absorbent pads), I’m not so sure I’d want to deal with a used model.
Given that Bock was in the laundry business, I was assuming removal of drycleaning solvents eg carbon-tetrachloride or more modern equivalents (not really much better).
I’ve called and emailed NSEP, they’re a little slow on their response…wonder if they’ve had a dozen calls in the last 24hrs just in response to this thread?
Edit: see above or Washing Machine "Salad Spinner" tek - #70 by cyclopath for ballpark pricing on the NSEP 55 series.