Why are PC-98 series computers so expensive?

[OrdinaryOtaku]

I want to get into the Japanese NEC PC-98 computers because of the high amount of anime and anime-based games on the computer. But, there's one little problem. All of the PC-98 series computers I come across on eBay are SUPER expensive. The lowest I've seen for one so far is around $2,000, which is for the laptop version and a newer version of the PC-98. Wikipedia says that over 18 million PC-98s were sold by 1999. There is such a high amount of them yet they are SUPER pricey. Why is this?

eBay listings:

http://www.ebay.com/itm/NEC-PC-9801UF-PC9801UF-for-CNC-Sodick-wire-EDM-Japanese-Engineer-Refurbished-/251625081693?pt=LH_DefaultDomain_0&hash=item3a96060b5d

http://www.ebay.com/itm/NEC-PC-9801US-PC9801US-for-CNC-Sodick-wire-EDM-Japanese-Engineer-Refurbished-/251625081692?pt=LH_DefaultDomain_0&hash=item3a96060b5c

http://www.ebay.com/itm/NEC-PC-9801UV11-PC9801UV11-for-CNC-Sodick-wire-EDM-Japanese-Engineer-Refurbished-/251625081689?pt=LH_DefaultDomain_0&hash=item3a96060b59

http://www.ebay.com/itm/NEC-PC-9801RX-for-CNC-Japanese-Engineer-Refurbished-/251625081685?pt=Desktop_PCs&hash=item3a96060b55

http://www.ebay.com/itm/NEC-PC-9801EX-PERSONAL-COMPUTER-PC-9801EX2-TESTED-WORKING-/261351669240?pt=LH_DefaultDomain_0&hash=item3cd9c5fdf8

http://www.ebay.com/itm/NEC-98-NOTE-COMPUTER-PC-9821Nb7-D5-TESTED-WORKING-/281231959665?pt=LH_DefaultDomain_0&hash=item417abb2671

[otaku]

I'd be interested as well but those prices are nuts I'd check with some importers I can't remember but I came across a site that has a service offering to find things in Japan surely they could find one more affordably even after a finders fee and shipping if so let me know I will do likewise!