Big Mike,
I often post coordinates if my readings are way off, sometimes I post it, but I've never told anyone to buy a new gps...LOL. I think if your readings are off, you should let the owner know, but only so he/she can check again. It should be done in a curteous manner. But as previously stated, if no one else if having problems, I wouldn't worry too much about it. There are way too many variables that can cause bogus readings.
Keep on cachin',
David "TPT"
David, Jan, Hannah, Tyler, Rebecca, and Maggie the Geocaching Dog!
http://www.muskingumriver.com