Re: The familiar cry of the freetard.......
When you're looking for a piece and aren't sure of the track title, or the artist, you might want to listen to the track before purchasing it. This is why music stores had/have those sampler stands available where customers can listen to an artist to see if it's what they were looking for.
So yes, download the track, listen to it, find it is what you're after and go make the purchase. Or find it's a remix, cover copy, or utter rubbish with a similar title, and delete it instead, and incidentally saving your pennies for the music you like, supporting the bands you like, and not encouraging the utter rubbish some bands have put out in the past.
It's why I like Amazon - I can check the tracks to see if they're what I thought they were. After all, various artists have released different versions of the same song, and I might be after a specific version (live v studio, vocal v instrumental etc).
So not everyone who downloads (or downloaded) was stealing: Some of us were after samplers and those weren't available, so made do with the full song instead. Oh, and sometimes the only way to get a song is via download until some music company gets of it's rump and releases it again, hopefully without some soundbox back-beat rubbish that ruins it, or overlaying another singer's voice just to make it sound 'new', or some other garbage like that.