LONDON.- Christie's and Phillips have both gotten rid of smaller, regional units of their businesses, according to reports in the Antiques Trade Gazette. Phillips-Selkirk, the 160-year-old auctioneer based in St. Louis, Missouri, has been sold by Phillips de Pury & Luxembourg to the Phillips-Selkirk managing director, Malcolm F. Ivey. The firm, which was originally acquired by Phillips in 1998, is now known as Ivey-Selkirk. At the same time, Spink, the London Asian-art auctioneer founded in 1666 and acquired by Christie's in 1993 only to be closed down a year ago, has been bought by its management. The purchase was led by Spink managing director Tim Hirsch with backing from the Singapore-based investment firm Abaca Capital. Hirsch said the firm would build up its business in the Far East.