SALES IN LONDON, HONG KONG AND NYC If the much- talked-about economic recession ever hits the art market, at least it will give us a little rest. The last week has seen a whirlwind of auctions in London, Hong Kong and New York City, with more to come today and next week. Itís enough to make your head spin. One interesting note -- several of the big-ticket sales are of collections specifically formed as investment vehicles. It has been a good time to sell for art speculators.