Aside for the mobius and B1W the A139 is a first for me in screen less camera, but it dont really matter when it ( the wifi ) work as good as it do.
On the other hand my SG9663DR, connecting to its wifi are pretty much impossible for me, while i am no wifi or network buff, what happen here at my place, and i think the only place are a mystery.
The DR transmit wifi just fine, just most times i can not connect to it, and then suddenly one day i can connect / disconnect as much as i like to, only to not be able to do that the next weeks.
So very pleased the DR have a screen.
270 USD look as a reasonable price for a system like this.