Everytime I visit the forum I wonder “what did @BoRRoZ dig up this time?”. Read: Keep up the good work 
Nooooo, just bought 2 on eBay for euro 21,75 each. 
€14.00 - http://www.elektronica-online.nl/?content=945
€10.95 - http://www.elektronica-shop.nl/contents/nl/d1610_Montage.html
really cool, I didn’t knew this existed
what about this between your kitchen tap (or shower)
you can charge a battery (with a charge circuit|) while doing the dishes
Wireless Things in the UK are sadly shutting down and doing a 70% off sale on their remaining stock.
Some good offers to be had, e.g. 868Mhz rubber duck antennas for £1.64 and more. Have a look around the website.
https://www.wirelessthings.net/868-915-mhz-rubber-duck-antenna
This one is larger than the image suggests
The +14dBi monstrosity arrived from china these days.
I’ll hook it up once I figured out how to reduce the TX power to legal limits. 