Clare Bulb Co comment:  A popular mid-season variety that has very large flowers. Best Seller is slightly shorter than the later varieties. The flower is a lovely buttery yellow.
The picture below shows Best Seller in a vase on my office window-sill, where the size of the flowers is very obvious. The bottom picture is very pleasing.
 

A customer's display of Best Seller in Lancashire. Drivers stop their cars to admire the show, and why wouldn't they?