If you are registered, you get access to the members only section, can participate in the buy & sell second hand forum and last but not least you can reserve your preferred username before someone else takes it.
I was also looking for one for a long time. Saw the HK ad but $900 plus shipping, import duty to NL, sales tax,.... just too much. Then, lo and behold one appeared on our local site (marktplaats.nl). Bidding from Euro 300. Brand new in the original box. I settled with the seller for Euro 375. The finder is great, better image then the standard one. It has diopter adjustment built in (I use +1) and even a 6x4.5 frame marking. It was sold because the seller moved from Hasselblad to 4x5. My advice is keep looking for one at no more than $5 - 600.