I picked up a used 808 about 12 years ago now for $90 from a friend who had gotten it from an ex-operator at the time...at the time, I was a true beginner at soldering, but he said the unit was nearly indispensable for this type of work. And boy was he ever spot on!
Seriously, the unit functions nearly perfectly to this day and all I've had to do through the years is to clean out the vacuum pump unit a couple of times and replace the disc filter.
I hope the newer (and more expensive) version is as good...but I hear it may or may not be...
Jon