joining me is catherine boyle for the "washington post". catherine, what an interesting position. christy's looked only at the works bought with city dollars. it constitutes maybe 5% of the entire collection. so should that price estimating taken with a large grain of salt? >> i think a lot of people thought it was a pretty low estimate. the original estimates that were done independently by the detroit free press were between $1 billion and $2 billion. some people had it as high as $8 billion, which was exceedingly hot. that sort of low appraisal will help the institute of arts. >> it's got to be a pretty substantial collection. van gogh, rembrandt. >> this is one of the greaten sigh khroe beadic works. so these are works that if they go to the auction block there are very few people who can afford to buy them. many were head overseas to qatar or russia because they are such expensive, priceless works. >> that would be for private hands. >> if they go to auction it would be very, very difficult to control who buys the works. that would be the worst case skin narrow. they are hopi