Underwood no. 5 standard typwriter

This is an Underwood Standard No. 5 Typewriter.
I just picked it up off Craigslist. My best guess is that it was made around 1924.

This typewriter is very clean and in excellent condition. It still types. All keys, switches, and cylinder still work and slide smoothly. Paint is intact with few signs of wear.
I intend to thoroughly clean it and put in a new ribbon. 

I'm curious what this beautiful machine is worth. Please contact me with any pertinent questions. Thanks for looking!

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