It looks like the buyer of the complete set of Famicom games has changed his/her/their mind according to Akibablog (NSFW). Well, I guess they decided there were better assets they could invest their US$7300 in. Put it in a tax-free bank account for example and one could net quite a bit of interest anyway if Japan have those kind of accounts.

On the other hand, maybe the seller should consider setting up their own games museum. Looking at how many are dropping by to take photos of the collection and their comments, they could end up making a small sum of money from it.