Portobello Road, the site of Harbottle's shop, is justly famous as a world-class attraction. As you might expect, the sheer size of the venue means that different kinds of dealers are present. There are many people who have corkscrews, but nobody has as many. Also present are silver wine coasters in a variety of styles and prices. As at all but the toniest shops, you can bargain.
Most people ask for a discount.
If your taste for outdoor markets hasn't been slaked, you can still make it to Camden Passage on the same Saturday, or on a Wednesday, when there will be fewer tourists. Camden Passage, in the North London borough of Islington, is a combination of permanent shops and stalls that are set up on market day. The dealers sell the more upscale and pricier goods, and have a solid reputation among serious antiquers. Sue Emerson Antiques has specialized in corkscrews for 20 years and always has several hundred on display. The price may seem high, but in the past several years corkscrew collecting has taken off.