Sure, buy an AP and just let it sit there unconnected. As soon as a few smartphones with their Wifi and GPS turned on pass by it, its position will make part of location databases and be used by smartphones to locate themselves.
That's what I'm saying: any Wifi AP is usable out of the box. Just plug it to a power socket, and it'll start broadcasting beacon packets that smartphones can use to geolocate, just like with iBeacon. You don't need to do anything.