Life is short - getting a machine of your heart's desire - worth it! My White 670 was bought solely because it was the model my Mom had when I was growing up.
I may have just scored - but I won't know for sure until the machine arrives - I've got my fingers crossed it's the Pre-National model that takes the longer shuttle - the only one I'm missing of the Boye Shuttle group. It's got some markings of both June and Eldredge, and they were working together before they merged to become National. No matter what, it's different enough from any I currently own.
Though maybe I should go buy a lottery ticket - since I seem to have a good run of luck - finding two of the few machines I'm after two days apart!