Hi Brad,
I can't help you - I sell mostly vintage postcards so they just get popped into an envelope, but there have been many threads on this subject in the last few months.
Some like UPS, some like Greyhound, apprently FedEx is the least favourite.
Sorry I can't be more help but I didn't want you to think your question was being ignored! Someone who ships larger stuff should be along with some advice before too long -- I hope.
Glenda
Glenda