The descriptions of the items is virtually non existent. Even the photos are not very revealing. For instance, the listing for a "Rockwell table saw" shows photos of a scroll saw and a radial arm saw. The photo for the "Rockwell band saw" shows the scroll saw. They don't even say whether the motor is single or three phase. Basically, as Guy noted, you would have to go there to look at what is available before bidding. I would be worried that even if there was a number to call and speak with someone, you would not get answers that you could rely upon. Seems to me that it would be a simple matter to photograph the name plate on each machine, as that would give you some information regarding age, model #, electrical requirements, etc.
Matt