I just bought a bunch of stuff from Moyer today directly thru Ken, and my shipping cost was $14.90. The bulkiest part of the package is the spare manifold gasket and water jacket side plate gasket. I got some other small, heavy things, so I am guessing the total weight is probably 6 lbs.
I certainly understand that buying a $3 gasket would probably cost more than it is worth to ship, so I grouped my order and bought 6 gaskets, plus the exhaust manifold flange along with the bronze mixer.
Seems reasonable to me, but I am also in Maryland where Moyer ships from, generally.
I do think it would be nice for Moyer to offer to jam stuff into a flat rate USPS box for those farther away that aren't in a rush for parts like me.