http://www.bargainjohn.com/f738cSewingMachine.htm
is this the one you saw?
all the other ones online (no fancy cabinets) were $150 or under. they were made by sears early in the 1900's. there's one listed on the goodwill website for $10.00. be sure of the working condition if you're thinking of buying it.
edit: that price in the upper right-hand corner is for the bookcase or whatever that is. the sewing machine has been sold and doesn't show a price.