I have sent a couple of e mails to this ebay seller. pointing out to them that this is not a true name and the plant is in fact Musa Nagensium.
I sent them quite a number of photos of both young seedling plants and more mature plants. I was even tempted to buy one and then negative feedback them for misdescription. DO NOT BUY these plants thinking they are something different because they arent.
Are they cold hardy? let you know next year I have 5 or 6 in the ground.
I have Nagensium and Nagensium X (don't know what its x'ed with though) and Cheesmannii. will try and post some pics at some point, but they are very similar. ID is made more difficult in the UK as I haven't yet got them to flower. For detailed descriptions of leaf/petiole shape etc. check out David Constatine's excellent work here...
The Musaceae.