Terrific find - Congrats.
But I have a different take on the saddle. I'm from the group that can't tell a Brooks from other medieval torture devices, but I think the Avocet O2 Air 40R is the most comfortable saddle ever. Unlike Brooks, they're no longer being made. From the prices they're recently fetching on ebay
(see example here), I infer that my favorable opinion is shared by at least a few others. If it's in good shape and photographed well, you may be able auction if off for enough, or almost enough, to cover the cost of a B-17.