March serp belt pulleys with factory brackets

Just looked up the 3 pulleys from March - crank pulley is around $89, WP is $95 and the alternator is $56 which = $240. Pricey for a set of 3 pulleys? Of course, but, all the extra belts can add up quick @ $12-18/ea. A single 45" serp belt would cost around $30-40 depending where you get it so you're all in for just under $300 bones.

Based on watching the belt vibrating this morning, I guarantee it will come off again at the wrong time. Thinking about this scenario from that angle, $300 seems reasonable to correct an age old problem that could potentially cause way more than $300 worth of damage from tossing a belt at high rpm.

Plus, I can always reuse the pulleys on another engine so it's basically a one-time investment.

Just a better mousetrap I guess. New cars have not had v belts for years.