Let me see if I can sum up what Clint is trying to say:
If you buy a scanner, cheap or expensive, don't count on getting "All" or "Any specific" frequencies that are being listed in this topic.
Wrightwood is a very unique area for using scanners. Certain frequencies can only be picked up in some areas of town.
I've taken my good scanner to the west part of town, connected it to a friends antenna identical to mine and was not able to pick up the frequencies that I receive at my house.
Better scanners and antennas will help but are not a guarantee by any means.
No matter what scanner you get chances are high that you'll receive plenty of broadcasts in Wrightwood.
If you think about it, not much different than listening to your car radio in Wrightwood. Some areas of town they work and some they don't.