Tons on aliexpress https://www.aliexpress.com/wholesale?catId=0&initiative_id=S...

Refurb on ebay http://www.ebay.com/itm/Garmin-Head-Up-Plus-Display-HUD-Navi...

Are any of those integrated with a phone? They all look like they are just OBD-II speedometers. $25 for a simple product like that is reasonable.

Only the garmin is integrated via bluetooth. There are chinese clones of the navdy but haven't found a way to purchase them.

There's a comment above (https://news.ycombinator.com/item?id=12790191) that mentions one of the Chinese clones by name: Carrobot. That might help you track one down.

That's the one, I couldn't for the life of me remember the name of it. Not worth tracking them down though after I found out language barrier would be impossible to overcome.

There's tons on ebay.

http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m5...