Matt,

I use USPS for all my shipping unless someone ask for either UPS or FedEx,

I just sold two pre-1898 rifles. I sent a rifle via USPS to Kodiak, AK (small town) and another to Pennsylvannia. The rifle going to Kodiak was sent by USPS and arrived 5 days later. The rifle sent to PA was sent by UPS at 150% the cost of the Alaskan rifle shipping cost and took 11 days.

Now, I have had bad luck with FedEx, UPS, and USPS but overall, USPS is more cost effective and as reliable as the other two.