Definitely no USPS, they’re much pricier for heavy items. My quickie rule of thumb is $1 per pound, if it’s normal sized, as a ballpark. I just shipped two iron FE heads in separate boxes for $75 total, guessing they’re about same weight as a center section and being two boxes you’d think more expensive. If you’re sending it to some spots in the West where there are few roads, that’ll Jack it up in a hurry. Agree that $135 sounds high