I think when they call to schedule an appointment, if they're bringing my hardware with them, I'll say "come on out, but it'll probably be a non-standard installation..." not giving any details, but warning them anyway. Then when the guy shows, I'll explain that I'm capable of doing it myself, and explain that I already have a satellite signal coming in to the apartment, so this dish setup isn't needed.

If I already have the hardware when they call, I'll say ... "oops, I guess I already hooked it up myself. Don't worry about it."

Greg