It is just about impossible for a buyer to arrange the shipping, That does not work.
Greyhound works with light stuff, Body panels and such. Personally I find Fedex to be good on mid weight items, that is up to 150 or so. Strap stuff to a pallet or wrap up a bumper and they are good. The stuff on a pallet has to be boxed though.
Now the heavy or large components need to ride on a truck. I no longer can advise who to use since the pricing has been in turmoil the last 5 years. The truck will take it on a pallet, strapped and wrapped. Some items such as an engine you may be best to build up some blocking to support the load otherwise the pallet will break up.
I will be curious how you make out since I will be breaking down a 95 SR later this year and selling much of it.