Amazon: Seems like a pretty good deal:
Feather Artist Club ProGuard Razor Blades
$38.00 for (5 Pack of 15)
Buy 2 or more, save 3%
ASIN : B00EXG1K8I
Feather Artist Club ProGuard Razor Blades
$38.00 for (5 Pack of 15)
Buy 2 or more, save 3%
ASIN : B00EXG1K8I