I think something like an eBay for NEM will be a requirement considering things like this are starting to emerge:
http://www.thebitbay.org/Hmmm!
Does it mean that this should be a feature (p2p marketplace) integrated into NCC - NIS
and not as simple (centralized) website?
Yes, I checked out Amys link on the forum. I think this is something our devs could do.