How can I prevent ebay from allowing sales ineligible for my shipping method?

[resurrected_riches]

Today was yet another time I've been screwed on shipping. I sell large auto parts and I do NOT want to send them USPS. Its far more expensive, and they're far rougher on the packages. I choose FedEx as the ONLY shipping option, but when people go to buy, eBay doesn't seem to care if their address is ineligible for FedEx. I just went to print a label for a customer only to find out there were no choices for FedEx and I had to ship via Priority which cost me an estimated $12 more. This has happens to me several times a year. Is there any way to prevent this?

[myescape]

do you have po boxes blocked in your preferences?

[resurrected_riches]

Probably not, but the addresses aren't typically P.O. Boxes. I'll make sure to adjust that, though. Thank you.

[soh.maryl]

Other than PO boxes, what other addresses are not eligible for FedEx shipping?

Just curious.  

[resurrected_riches]

Apparently they just don't deliver everywhere. The one I just shipped is a person's address in Missouri, which from google maps, looks like a nice neighborhood with expensive houses.