Chardonnay is a superb wine but the problem many people have is that they buy the cheapest Supermarket brand that they can find, and when it tastes like Vinegar they think that it is a crap wine.
It is not expensive as I drink it myself. The best Chardonnays come from the likes of California, Australia, New Zealand, South Africa, Chile and Argentina. All these can be purchased at your nearest Morrisons, Asda, Tesco etc for well under £10 per Bottle.
Don't bother with the European ones as there are far better ones on the Market.