As you probably just caused the existing homeowner a few headaches and/or many dollars it actually seems kind of "ballsy" to then ask if they mind you advertising on their property for the next few weeks while they still own the home (or longer if you killed the deal).

I could see it being effective in new sub-divisions, but I would imagine the builder would pull up your sign as soon as you left.

So...good thought, but I'm not sure about the practicality.

__________________
Richard Moore
Rest Assured Inspection Services - www.rainspect.com
Seattle, Washington