I may have an opportunity to purchase a teletype. I wanted to receive the group's feedback on any history with the unit before I do and what modern interfacing may exist with it. 

Please see the photos here: https://imgur.com/a/LNSyUmD

It appears to be (from photos) a Bell System "Teletypewriter Service" unit. Comes with an integrated table made of wood. It's possibly a Model 15 but I haven't found an ID that looks like it. 

What would be a decent price to pay for this?

Thank you,

- Reid