Only buy wines from reputable merchants or suppliers. For best capital return, choose well-established producers, such as French Bordeaux and labels like Chateau Mouton Rothschild, Chateau Lafite Rothschild, Chateau Latour and Chateau Margaux. Big labels offer more consistency, but it's still important to choose the right vintage. Rare wines have a better premium and hold their prices better. If you are dealing with a wine fund or specialist wine investment company, look at its track record. Always compare prices and shop around. To reduce storage charges, buy a small number of high value wines. The wines must be in perfect condition. Make sure you have the full history of the wine. For French wines, opt for ones bottled in a chateau, as there is more surety that the bottling was controlled. If you buy the wine directly from the chateau, or you know the wine has never left the chateau, it is likely to have been stored properly. A wine should be transported as little as possible. Magnums age well as the total bottle surface area is smaller for the volume of wine and so there is less exposure to air and light. Proper storage is essential. Wines must be stored in a cool, dark place.