Shipping Vinyl Records..

I went though my collection and realized I had quite a few doubles of some popular rock and jazz records in near mint cond. It cost nearly $10 to ship one record from California to the East Coast. Maybe I packed them too good as the total weight with box was just a shade over a pound. I see people charging $4.00 to ship records on other sites.. anyone have tips here?... as I have a few more to unload.