Oh no way! $3000 is way overpriced. Well, unless it's brand new. I bought mine for about €400. In a very good condition, including an adjustable adapter for the GG, which shows the crop you'll get in all formats. Bought it off the bay in Germany.

PS: I just checked eBay. There are three Sinar Zoom 2 available as "buy it now". All of them around EUR 550, which is more expensive than I got mine. Definately expensive, but obviously way below USD 3000... Maybe you'll get lucky and be able to auction one or find a cheaper buy-it-now one later on. I guess Christmas season won't be the best time to but stuff off an auction anyway...