In the old days collectors of the port knew nothing except how to add and subtract-mostly the latter.

"They're simply not available any more, and collectors know it."

Few collectors saw the painting or even knew it existed.

Every serious collector knows about it; many dream of finding one, but few have ever seen one in person.

Morello don't like one collector to know how much other guys bring in.

Many collectors know the serial numbers of the originals by heart.

The collector will know that it is faked up in the style of an earlier period.

And collectors knew it: every one of the sculptures exceeded its estimate.

"But canny collectors have always known that's the time to buy art."

Pipes explains, "The true collector never knows when or where he'll discover his next treasure!"