Ebay changed its policy to charge fees on shipping some time ago, because it knew that some people would always try to pad shipping.
Heavy items are rapidly becoming prohibitively expensive for ordinary citizens to ship. If the price is high enough to absorb shipping, no problem. But you can't start an item at a low price with a too-low shipping fee, or you will get hurt someday.
Realistically, that "portable" computer (ha ha) which is actually very cool, will cost $25-30 via Parcel Post to a nearby state, $30-35 to a more distant state, and slightly more than that via UPS or FedEx.
If I were selling it I would charge about $40+ for shipping and that would not be a profit point.
Still, <$100 delivered for a piece of history like that is not bad at all.