This has been mentioned on the iBob list, but I thought CR folks might be interested. Nashbar has some vintage saddles on their Website. For example:
San Marco Regals for $40 (I seem to remember an informal survey on this list a while ago where a bunch of folks voted this their favorite saddle.)
Turbos in 5 colors for $22.45
Concor confort for $25
Selle Italia Superprofessional Saddle (a Unicanitor copy in black suede with yellow logos on the sides for only $10--I bought one of these and it's quite nice.)
Use coupon code CR196 for a 10% discount.
I'm not connected to Nashbar in any way.