The VENDO 23 series was manufactured from 1949 to 1959 with just a little over 40,000 being made. Going by the serial number of yours, it appears to be a 1955. Depending on it's condition and if it is complete and all original, meaning does it have the red top with the red base? Does it "cool" and "vend" and is the panel on the front of the machine flat with a decal? Is this machine set to vend for 5 cents or a dime? I buy alot of these "23 spintops" and I will enclose a pic of one I just purchased recently. If your interested in maybe selling it contact me 1 800 241 8577...If you just want a estimated value answer my questions and I will tell you. THe pic I am sending is an a-23-B .....DOC
follow this link for the pics
http://users.ids.net/~sornbgr/VENDO23.jpg