Fair price and ways to find a teletype

I've been watching a lot of vintage computer videos put up by enthusiasts (thanks so much for that). I have been really fascinated lately by the Altair and teletypes, paper tape readers and so on. Just watching one fellow load BASIC into his Altair. you just felt the history and the connection to Bill Gates and all the pioneers of an era that was happening just as I was being born. I only ever see teletypes for sale on ebay, only in the US, and of course I don't bite because of shipping costs, plus usually people ask insane prices for them. I am wondering what a reasonable price should be for a unit with a paper tape reader, and any tips on how I might go about finding one beyond Craigs, etc, up here in Canada. And anything I should watch out for and so on. Thanks muchly, Brad