Hi, I might want to buy a Sony vw50 because I can get a sweet deal on it.
But is it true that it´s not possible to get any dust bulb on it, like a normal LCD projector, or is it just a good sales trick ?

Best regards

LCOS/SXRD projectors have sealed light paths. I haven't heard of dust blob problems, but you may want to do some searches.

The lcos are sealed. I gad a jvc g15 that got a blob. The optical block was replaced under warranty.