I got a reply from the seller. They concur that it is a MasterSpa 750 but do direct me to their "homespas" site. Sounds phishy (at best) to me as well. I'm thinking about "playing around" with the seller by acting REAL interested just to see what happens... Afterall, why would I care about Homespas if I am buying it from her personally, right? BTW - HOMESPAS site has nothing on it but an email address... Hardly well respected...