When Vendors don't answer calls, emails, voicemails?

Reminds me of local contractors. We talk to contractors at a home and garden show to do some major house repairs. They take our address and phone number. That's the last we hear from them. They apparently drive by and don't want to do the work and don't have the decency to just call and tel me they aren't interested. I don't need any excuses just an acknowledgement. :BangHead:
Like when you get home roofing quotes ranging from 6k-25k....the 25k is the "i dont even want to do it" price