I’ve bought several items from fellow OGRers, and their packaging is far superior to the usual retailers. The stuff from Stout Auctions is also superb. My most delicate piece, a 6-17336 PFE reefer, was bought new on eBay and was delivered in one piece.
That being said, I’ve never received a damaged piece from anyone. I’ve had stuff delivered from USPS, UPS, DHL, and FedEx. I’m sorry for your problem.