Nice looking Deagan Marimba from the 1920's just listed on Ebay. Any thoughts.

This instrument is 32 inches wide, and being three-and-a-half octaves it has 26 keys on the keyboard closest to the player. After making allowance for the space between keys, this suggests that each key could only have a width of one inch, or maybe even slightly less.
Most marimba players prefer keys which are wider, both for reasons of sound quality, and also for ease of "aiming" for the correct key. Many 3.5 octave marimbas have a width of about 60 inches.