BSD source?

[bruce at graffiti.UUCP]

My stupid question of the day is...How does one get ahold of
Berkeley Unix source code?  Is it as expensive as AT&T Unix
source?

Well that's actually two questions, but it seems reasonable to
me that since Berkeley is an educational institution and not a profit
oriented business, that its "products" should be less expensive
than the other guys.  (Although their documentation is expensive
as crap!  Last time I checked, the Unix Programmer's Manual for
4.1 was approx. $350.00)