what do you think of the 2 person infrareds on ebay? worth it?

i recently helped a client purchase a 3-4 person sauna from ebay, we (my husband and i) picked it up, delivered it and put it together so I have some experience with the workmanship. I was a little dissapointed in some of the materials seeming flimsy,etc. However the client says he loves it, sweats like a pig,etc. I would like to purchase one for us in the next month or so but would like to know if there are cheaper ways and if the ebay ones are worth the 1,000.00. thanks guys! specifically i've looked at the waterstar ones. Tweet