The only trick I know only works if you bought PMs at a higher price than the current market. A friend of mine, Michael Checkan, runs a PM dealership in Rockville, MD, called Asset Strategies International. They offer an unusual program. If you send them PM - bullion or coins - they will buy them from you at the current price and sell them back to you at the same price and establish a new basis. Because they're not securities, it's not a wash sale and you can deduct the paper loss on your taxes. Your only real loss is the cost of postage. - which, fortunately, is also deductible.
They do several unusual things. They invented the Perth Mint Certificates, for instance. They were also founding members of the Hard Assets Alliance.