ronw: I don't know I think $69 is pretty reasonable considering one of yours cost the same.
Yeah, that's a genuine Google Nexus charger - it's a truly beautiful piece of kit with a glass top, magnets to hold the phone in place (even vertically) and microsuction sticky stuff underneath. I really like that one, but I won't be getting more than one of them. The generics are just too cheap and charge just as well. But if you want to spend that much - then it's definitely the one I'd be going for.
There are heaps of suppliers on eBay and AliExpress that offer the conversion kits for non-wireless phones. Can't recall exactly because I was trying to filter them out, but probably in the range $3-$7.