for any of you having trouble, just keep trying.
seems a silly thing to say, but as you might have gathered from the above info...
stock goes in and out without rhyme or reason.
i was trying to get the discounted neptune carrier (down to $45 from $60)
and the discounted quest against time (down to $40 from $50)
earlier today, the neptune carrier was in stock,
but by the time i got to check out,
it was gone from amazon's stock...
and it was sending me to another seller, but fulfilled by amazon,
and the %50 off the 2nd item wasn't showing up.
came back tonight, and lo... neptune carrier back in stock.
with the original price reductions + the added discount...
$110 MSRP for $65.
no tax, no shipping....
if you add in the 8.25 sales tax i saved,
that's 45% off the total order.