The table I had the Shure on originally was a Thorens 165. Looking at pics of the 150 on eBay, it seems the arm is less impressive than others in the Thorens line, but I won't extrapolate to the sonic differences.
The price seems fair, if not a great bargain, since similar tables have been sold on eBay in that same range. One good thing is that Thorens is still a popular TT for resale, so you wouldn't lose much, if anything, if you decide to upgrade later.