However, collector interest and values for these cars remain high.

There was, however, a measure of collector interest and controversy over die errors in the Wisconsin quarter.

As prices rose, she moved on to the 19th century, then not a subject, except for Impressionism and post-Impressionism, in which collector interest was hot.

In addition, it has increased collector interest in all the lines.

In the second tier of collector interest, the 1910-12 Limited - the biggest Oldsmobile ever built - comes to mind.

"What we're seeing is a lot of collector interest - not investors and dealers," Mr. Goldberg said.

Pre-1964 Hornby trains have enjoyed a level of adult collector interest since the 1940s.

These Oldsmobiles were long ignored, but stronger value appreciation potential now reflects increased collector interest, especially among younger enthusiasts.

Ploys such as packaging "errors" and "short-packed" figures have also been used by toy companies to increase collector interest.

With the advent of "slogan" or "logo" plates, another area of collector interest was born.