Artnet magazine gives some numbers for Art Cologne:

Reported attendance was 56,500 — topping 2008’s estimate of 55,000 — with a “slimmed down” roster of 184 exhibitors, down from 249 last year. Among the collectors on hand were heavy-hitters like Christian Boros, Sabine DuMont-Schütte, Ingvild Goetz, Don and Mira Rubell and Anita and Poju Zabludowicz, as well as Harald Falckenberg, who won a special award for his patronage.

Reported sales included a painting by C.O. Paeffgen for €16,000 at Thomas Levy from Hamburg; Stephan Balkenhol’s sculpture Ikarus, which was featured on the sidewalk in front of the fair, and sold to a new client for a six-figure sum by Dietmar Löhrl; Fritz Winter’s oil Komposition 17, which sold for €190,000 at Utermann; Ernst Wilhelm Nay’s Spirale in Blau for €335,000 plus four studies for a Nay painting titled Die Jakobsleiter for €158,000 Bert Schlichtenmaier from Grafenau; Tom Wesselmann‘s Red Ending for €450,000 at Klaus Benden from Cologne; an oil painting by David Reed for $70,000 at Galerie Schmidt Maczollek from Cologne; and work by art-market newcomer Philip Loersch, completely sold out at the booth of Ursula Walbröl from Düsseldorf.

Art Cologne Wrap-Up (Artnet.com)