Pre-War Touring CarsHawking deals in antiques and cars of pre-world war two vintage are seeing a dramatic drop in sales. It's not that the modern collectors don't own these old engines and transmissions; it's just that they don't have the mechanical expertise to keep them going. Accordingly, these historic vehicles have become more and more neglected and are not realizing the auction house's expectations. Late Brass EraAs the baby boomers get older, they are leaving the hobby behind, leaving the brass era cars to accept negative votes.As older folks age out of the hobby, the brass era cars are taking the hits of negative votes. The slow speeds and restrictive handling of these early cars are hard to relate to for younger buyers. These cars are not particularly appealing to prospective buyers in the current craze for new models. Early Ford MustangsThe early Mustangs are coming off the shelves and have reached saturation point, but high-spec Shelby and Boss versions are still sought-after. Every day I see hundreds of standard inline-six and entry level V8s soaking up online auction platforms. This huge excess has significantly limited the ability to charge premium prices, and muted any sign of price increases. Mid-Century Luxury SedansPost-World War II giant American luxury land yachts aren't so popular with city dwellers these days. These gigantic machines create enormous storage issues and are inefficient at using fuel. Today, these unwieldy, airy roadsters are out in number for agile sports cars. British Heritage RoadstersOld school British sports cars are struggling to gain traction with the market. Older fans are less inclined to deal with the oft-irritating electrical systems and ever-present fluid leaks associated with these machines. Your car may end up costing more to keep up than what the market will give you for it. Ferrari Entry ModelsSome of the entry-level, vintage Italian sports cars are seeing a sharp market correction. Purchasing generally has turned to newer classics from the late nineties which are more useful and efficient. They are less popular with practical collectors due to the high price of engine out servicing.Base Muscle CarsThe days of high prices for normal, non-matching-numbers muscle cars are over. In today's economic climate, only those rare optioned vehicles which are well documented will offer the maximum dollar value. Average and normal clones and average driver-grade builds are being affected.The number of active buyers is decreasing dramatically for standard clones and average driver-grade builds. Series Jaguar CoupesThe more recent versions of classic British coupes are faltering because of their complicated mechanical design. The heavier, slower shotguns are less popular than their early production, pure variants. Many collectors will choose not to deal with the huge maintenance costs and costly parts in these models.