I don't think that the GPS suggested in the first post has a navigation function, in case that is important - it would be for me! The device is a Kickstarter project - see
HERE for info and comments on the product. Apparently, it
does support Strava etc.
NOTE You will possibly have to pay customs duty and VAT on top of the price quoted on
eBay.
I'm quite tempted to look for one.
@Littgull uses one for navigation on the rides we do together and he seems to have no problem navigating my routes. I still use my old Etrex but that is a bit big and clunky compared to the 200. I'm peeved that I have been unable to get course navigation to work reliably on my Edge 500, despite trying everything suggested online. If I had a 200 I would just use that for navigation and display ride data on the 500 next to it.