At Christie's on Tuesday night, a photograph by Richard Prince broke two records: for his works at auction, and for any photograph at auction. Last night's sale featured three works by the artist, all from Mr. Mugrabi. "Untitled (Cowboys)," from 1993, one of Mr. Prince's images of the Marlboro Man, was expected to sell for $600,000 to $800,000. What a difference four years - and 24 hours - can make. While an an 1989 cowboy photograph set the records at Christie's, selling for $1.2 mllion, there was no bid in sight for last night's cowboys. A 1980 fashion photograph also failed to sell.

Mr. Prince fared better with one of his paintings of naughty nurses. Aby Rosen, the real estate developer, bought "Mountain Nurse" (2003) for $744,000, in the middle of its $600,00 to $800,000 estimate.