The Kuhn Bosendorfer Grand Piano– $1.2 Million. Tying in for 6th/7th place is the Kuhn Bosendorfer Piano, though we’ve decided to give the Bosendorfer the extra kick in ranking because it’s the original and not a re-creation. Created by the widely acclaimed glass sculptor John Kuhn, and in collaboration with piano maker, L. Bosendorfer Klaviefabrik, this little err…. big gem was born. The 7’4’’black piano boasts a decorated bench with approximately 100,000 jewels polished by hand-cut glasses, because we all absolutely hate those jewels made from measly machine-cut glasses.