That's a pretty great find Hopper. The Racing Pick Up is hard to find in any condition, but as you say, finding those original Taiyo black box versions is quite a challenge.
I have a black box Taiyo Lamborghini Countach LP500S on the way to me at the moment, but it cost me an arm and a leg. As you say, these things almost never come up.
I've also sold quite a bit in the past couple of weeks, with Christmas on the way...so most of the rarities I had for sale have now been snapped up by people to give as Christmas presents (stats: 7 cars sold in past fortnight, 5 of which were new in box).