I shipped a light bar via Greyhound earlier this year. Cost less than half what FedEx/UPS wanted. Arrived in two days with no damage other than the padding on one of the corners had worn through and scuffed the powder coating. I had only wrapped the bar in a couple layers of foam and plastic pallet wrap, so I chalked it up to poor packing on my part.
In my case it was a straight shot from the drop-off point to the destination. I think where you run into problems is when the item has to be transferred to different buses due to routing. The transfers mean more time and handling; opportunities for delay and damage.
@JCROffroad, I haven't had to deal with Greyhound on a claim, but I have with UPS and FedEx. All major shippers self-insure, and their first response is to always deny the claim. It is a pain in the ass, but you do have to put in time and effort to document your costs and fight them. My experience is if you stick with it you will eventually get most if not all of your costs back, particularly if it is a low enough value item to threaten small claims court action.
But after 3 months I could see it being extremely difficult to make a claim. At this point at least part of the fault lies with you and/or the customer for lack of communications. I always send the buyer notification of any delays and then tracking or waybill info on shipment, fulfilling my communications responsibilities. If the customer doesn't respond the implication is that everything arrived in good condition. Patience is a good thing, but as with anything else, too much of a good thing is bad.
I'm a JKO Reject