[net.video] PBS programs on casette?

prgclb (12/14/82)

Does anyone in net.videoland know if the Public Broadcasting
System (or any of the commercial networks, for that matter)
sell past programs to the public on 1/2-inch format videocasettes?

I recently got a videotape deck, and can remember some
old Nova programs I'd like to have in my video library.

I assume in the case of PBS programs, I'd inquire at the
station that produced the program (e.g. WGBH for Nova).
Anyone care to speculate how much they'd ask for such a tape?

Thanks in advance,
Carl Blesch