Well, you might be able to get it, but it could cost you an arm and a leg to do so. I found this out a while back when I was looking for a particular out-of-print music CD from the early 1990s, The Left Banke's There's Gonna Be A Storm. Amazon.com didn't have it, but they did have links to third-party vendors who had it. Of course, if it's a collector's item, then the cost will be higher. In this case, it was $66.96 and up. And I found that I didn't need it quite that badly.
So if you're looking for that CD of Nancy Sinatra/Lee Hazlewood duets (Fairy Tales and Fantasies: The Best of Nancy and Lee), it'll run you at least $97.47. Or perhaps you want the Greg Kihn Band's Kihnspiracy? Then you'd better be prepared to pony up at least $37.75, and at least $62.99 if you want the import version. Your wallet's in jeopardy, baby, ooooo-oo-oooo-oooo.