Go on eBay and search for "New Old Stock" or "NOS". You'll find a ton of brand-spanking-new classic models from the 70's and 80's for mostly reasonable prices. That retro Nappey at the top is about $80, as is this early LCD model.

This green faced Timex Carriage was brand new and it cost me $14.99. I don't know how old it is but searching for the model number online turns up nothing but the listing I bought it from, so it's at least pre-internet.