Back when I got mine, the internet was still relatively new for businesses to be online. However, I did do a search and got the names and numbers of several Invisible Fence dealers. I called them and simply bought from the dealer with the best price on what I wanted. I installed it myself, and still have the setup I made with my sub soiler and a brake line to lay the wire underground with my tractor. I layed over 3000 feet of wire in less than an hour all those years ago, and it still works fine.
I get a kick out of people that come over and say that their dog will run through my invisible fence. If no contact is made, or poor contact is made, with the dog's neck, any dog will go through the fence. If you follow the instructions and shave the dog's neck where the collar probes contact the skin, (some suggest even using a light coat of petroleum jelly) and train the dog properly, I don't see any dog leaving. As a matter of fact, I'd say that after a few beers in the guest house, I've had about 4 or 5 guys claim that the collar wouldn't stop their dog. Each time I've had them hold the dog collar in their hand (remember, the dog has it on his neck) and run through my fence. Yeah, paint that picture in your mind! /forums/images/graemlins/shocked.gif Afterwards, the conversation generally is about how they get that much punch in a little dog collar or how can a dog survive with that much of a jolt to their neck. /forums/images/graemlins/wink.gif
They obviously will not keep other dogs out unless they just happen to be wearing an Invisible Fence collar, but a chain link fence would be positively out of the question for where I live for numerous reasons. You buy for your need. My need was to keep my Shelties from wondering off. The Invisible Fence brand containment system has worked just fine for me. With my German Shepherd Dog, I used my Tri-Tronics Field 70 training collar for one single day of training when he was a puppy 2 years ago, and he has never left my property since. For him, I don't need a containment system.