From: "woodelf" <bfranchuk at jetnet.ab.ca>
  David Griffith wrote:
  The teletype model 43 appears much more often on
Ebay than the ASR33
 (which I've never seen there).  Is there anything about the model 43 to
 make it worth acquiring? 
 A quick google indicates it is your standard basic 110/300 baud
 remote printing terminal. 
There is an available ASR option that I occasionally see on eBay.
(It's basically a reader/punch that bolts onto the left side.)
    Vince