EBay refuses your post address? You do not know how to change it, to bypass address validation?
Some easy steps to solve this:
1. Go to http://zip4.usps.com/zip4/welcome.jsp
2. Enter your address and press Find button.
3. The USPS will return you the address with standard abbreviations and formatting.
4. Enter the modified address in ebay.
P.S. No, the link from above will not return my own address :)