Delivery is normally either 5 or 7.5 +vat depending on weight. I would guess 5 in this case.
Indeed, there is not much to it - just a bit of asymmetric angle with a cutout in the short edge.
So long as the "dongle" or whatever 3G device has a reverse SMA connector or similar then you can put the aerial where its best suited and cable that back to the device.
299 even! - still it can do 100 concurrent VPN sessions and other stuff- so its fairly "serious"...