Holy smokes, those are some expensive screws! Granted it's a whole set, but still it's $60...
I think part of the reason is that since you can't really buy them from Apple, they only way to get them is from a system pull. So, Supply & Demand take over. They have basically the only supply.
Only in Apple-land. Hopefully they'll give me one because I don't need a whole set.
I completely forgot about that avenue. They will almost certainly hook you up. The bottom is user removeable so you can replace the RAM/HDD, no one is perfect, screws will get lost. They gave me a set of the little plastic/rubber feet that went on the pre-unibody MacBook Pro/PowerBooks since my G4's had fallen off. They then promptly fell off again within a couple months, crummy design.