Holy cow, I wrote a book!
You can buy
510 grams of peanut butter for only $501.
Of course, this is special peanut butter.
It must be kept at -20°C.
And it is not intended for human consumption.
This is peanut butter from the
National Institute of Standards
intended for use by food analysis laboratories to
calibrate their equipment.
For example, standard peanut butter consists of
10.4% ± 0.2% saturated fat.
(Link courtesy of