On those used spas, keep in mind that you will most likely have to invest in other areas. For instance, that spa probably has an older, if not the original cover on it. That's going to be $400-$500. Also, I always recommend new filters for a used tub... you just never know (even if it is your friend.) On that spa, they use the Tri-X filters, so that will run you $260+ at least.