yes, i wonder that too sometimes...

40% read and compare specs, internet websites, compare prices vs. features
30% read and compare and read again the forums users posts
20% listen to demos and watch videos
10% inspiration and "clever decission"

it worked until now. i bought two keyboards from internet without playing them ever before, and they were both good. the other users appreciate them almost unanimously. korg pa50 and roland e60.
and some other things like audiocards, mixer, mics, and other equipment.

[This message has been edited by adimatis (edited 06-12-2007).]