However, Liss, who has worked with
Warhols for more than a decade, appraising works for the Art Gallery of Ontario and
other museums across the country, thinks collectors should be concerned about the foundation's decision this year to cease its authentication business.
Beginning this fall the Andy Warhol Foundation for the Visual Arts will disperse its entire collection of
Warhols, donating some and selling
others through Christie's auction house as it shifts almost exclusively into a grant - making organization, foundation officials said in interviews.