uwannawhat,
you can stack a dollar-off coupon with a free-item coupon
BUT you have meet the minimum purchase amount separately
for the Audiovox Maestro PDA purchase, most of the people had to do this:
$299.99 for PDA (use $40 off $200)
$ 69.99 for b&w tv (free with $100 purchase but the $69.99 does not count)
so the total must be $200 + $100 = $300
paperclips and gluesticks were used to push that up