Some time ago I was searching the forum and saw mention of modifications you could make to a $30 handheld Black and Decker type vacuum (a/c not battery) that had been given in one of the beekeeping journals.

I do sometimes let a few bees loose from my observation hive, and while it isn't a huge pain to gather them up- sometimes it takes a little bit : )

Does someone have the reference for that, or some info on how to make this mod?