For years and years, I have not seen a Dinoking giftset on auction on eBay. That was how rare it was (and still is). Now, a couple of days after I have acquired Dinoking, I see an auction on eBay for Dinoking, MISB no less!
Judging from the questions that the seller's been asked, it seems that there is quite a bit of interest for this piece from China. I'm not surprised that interest for this would come from many parts of the world because this giftset used to only be available in Japan and a few other Asian countries back in 1989. So, there isn't a large quantity of these produced back in the day (and also factoring in Transformers' declining popularity by the 90s).
There's still 2 more days to go and its already bidded up to US$1225.00 now!
Auction link with actual auction title (but despite what it says, this is not an AFA graded piece): Transformers G1 Victory Dinoking Giftset MISB D-328 AFA