Ask questions such as, Would they replace the ozonator and are all of the jets functioning and easily adjustable? Also are the headrests and rubber buttons under water in good condition? How is the cover? Sometimes they get very heavy. How is the cabinet? New filters? DOes it have an ez lifter and is it in good condition. These are all of the minor things that ad up in cost when buying a used spa. I would buy this spa if it were in good condition.
That is my one cent of input. (thats all they allow me as far as inoput goes)