One was a close out, no return, he put it up for sale.
One of the others, the guy said blank the town and all their stuped inspections, he started using it, until his neighbor droped a dime on him, his problem was not listing, but too close to boundry line, a zonning violation.
Another one , was the only one that finally got approved, after one year of them fighting with the inspection department, reason for passing was inspector refused to approve it and quit, new inspector approved it.
One thing we learned with pools, and spas, there is more then just wiring them, always check first that the spa is listed, and they will issue a permit for the job, and zonning passed before you start wiring.
Oh just one more thing, check if the spa is on a deck, has the deck been approved and inspected, for the spa weight.