Monoprice has the Lenovo ThinkCentre Chromebox (10H50003US) on sale for $130. You can use promo code MUTUAL to bring the total down to $97.49 shipped. I am not sure if this is a targeted code or not. Maybe someone can report back?
Amazon comparison - $185 [amazon.com]
Edit: Looks like this was a targeted code (got from my email). Either give it a try or check your mail to see if you are eligible. Added YMMV to title.
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