KingFrog's right. Those Zoom models are big sellers..., and do outsell the Boss line. They're also very easy to use.

Boss recorders are nice.., but as with ANYTHING that carries the Boss name you're going to pay a bit more even if the features don't match the competition. Boss gear isn't just expensive to the consumer but Boss dealer costs aren't that great either (unless they've made some changes over the last few years)