I'm kicking my self for not waiting for the annual Xmas eBay sale, I purchased a KMS150 a few months ago for $645 from Peter's of Kensington as a Xmas present and now there's the KMS160 available for around $70 less.
This is a great price for new, local and delivered stock. Be warned though, Peter's of Kensington will deliver this in an enormous pink box. Great for the kids to play in but not so much for keeping the present a surprise. There's more colours available than the one I've linked to as well.
Only difference between the KMS150 and the KMS160 is the extra bowl and (at least on the Peter's of Kensington's eBay page) a wider range of colours.
This is probably a good deal, but I'm just curious, how could this thing so expensive, it looks like a normal egg beater to me. Applogies for my ignorance.