I won this eBay auction today. I was the only bidder, at $19.99 CDN with $17.77 shipping total $37.76 CDN = $28.27 USD for three Northern 500 phones. I was interested in the green phone, the other two are a bonus.
http://www.ebay.ca/itm/Vintage-Rotary-desk-telephone-lot-Northern-ElectricTelecom-/331797746369? (http://www.ebay.ca/itm/Vintage-Rotary-desk-telephone-lot-Northern-ElectricTelecom-/331797746369?)
Doug