香蕉视频苹果下载Three years ago, Simon Brown, a 36-year-old public-relations professional in Washington, D.C., purchased a 1938 Joe DiMaggio baseball card for $1,500. Its value now: $2,500, up about two-thirds, based on sales records for comparable cards, he says.

That kind of price appreciation is common in today’s sports-memorabilia market, particularly for items priced at $1,000 or more, market participants say. Just as stocks, bonds and other assets have soared in value since the last recession ended in 2009, so has sports memorabilia....