I'm not sure of what the "Blue Book" value on such a machine is, but I can tell you that this is an extremely rare bird.  I saw one badly corroded with its motor missing, and the shop owner wanted $75 for it. Burroughs is a rare typewriter anyway.  I fixed one--the totally manual one made in 1931.  They started with the "electric" version in 1932.  Don't know how long they made either one.  Long story short:  See a burroughs--Get it if you can afford it.  It may not make "The Antiques Road Show," but you'll definitely have an interesting conversation piece--and playtoy.