desperately searched Sugahara Vase

First of all a big hello, as I am new to this Forum

I have a bit an unusual request. A few days ago on the look for a present for my mother (a collector for modern glassware) I saw a beautiful Sugahara-Vase from about 1980. The problem was that the dealer put an unreasonable high price on it (I guess he had smelled that I really wanted this vase). Normally I'm really not the person who starts to complain and haggle about prices; I know that it is expensive to keep a shop and so on, and beautiful items should have a reasonable price. But in this case it is different as the price is imho far too high; in short, he first wanted 750£ for it and a few days later on still 600£.

http://www.skinnerinc.com/asp/fullCatalogueSE.asp?salelot=2213+++++506+&refno=++525861

so now I'm desperately on the lookout for this Vase for a more reasonable price (I would spend up to 200£ on it).If someone here knows a place were it is for sale, or a person who would probably sell it, please let me know.

p.s. about the price: I got the picture from the website of an auctioneer where it was estimated together with the two yellow vases for 200-300$ and got sold for 153$ in 2003.