I happen to know Paul who is selling these kits. To be honest his prices aren't bad at all, if you are into NIB collecting, as they are stored in a temperature and humidity controlled room so you can be guaranteed they are perfect. If you are collecting NIB kits unless you are rich you really have to be lucky and find kits elsewhere or hope all the collectors already have what you want. In the good times he has been known to spend up to £15,000 in a month on ebay collecting NIB kits.
The Tamiya Black Porsches in the above picture are the holy grail of vintage collectors, NIB in a good condition box complete with bag will set you back around £5,000. Paul has at least half a dozen and has even split one of them for a fellow collector to replace the parts that were missing in the Porsche he had bought.
That guy is taking the p### surely?!! 'I was at my London home the other day, looking for something for my son, and just happened to find 6x NIB Tamiya Celica Rallys!