That fence charger on EBay is good for 25 miles of fence. I have no idea
how big your yard is, but most likely MUCH smaller than that. Home Depot
has smaller ones for less than that one is, not even counting the
shipping. Not sure about Lowes or WalMart. Hardware stores, especially
those in rural areas may also have them. There is nothing to installing
one-- about all you have to watch is that the wire is not grounded.
Anong other things , that can burn out the charger. Larry