I have bought two machines from Ebay. My first was my 301A. It came with the case also. The seller did a good job of packing it. Both the machine and case arrived just like pictured. The machine sewed okay, but I still took it to be serviced since it hadn't been used in years.
The other machine I bought was a pink Atlas. It was packaged very well also. It also came with a case but the case had previous minor damage that the seller told about in the listing. It sewed nice also but I later sold it.
If I found a machine I liked on Ebay, I would take a chance and buy it.