Seeking shipping advice

Get ready to be bent over.

Greyhound is best, but, if buyer can't pick up, they are going to get hammered on delivery. Most LTL freighters charge close to an additional $100 for non-terminal/dock/forklift delivery. Just the way it is now on large items. Prices are so out of hand it's not funny.

Greyhound is something like 80x50 for the largest two dimensions. The third would not be an issue for those items.