$25 garage sale bike (probably worth more)
$10 cog
1 hour redishing a wheel or $7.00 Six Pack for your buddy
4 hours disassembling, cleaning, lubricating bike

If your time is worth even $10 per hour nobody is getting rich here and those that do not have the time, expertise or would just plain rather be riding that tinkering in the garage are getting an entry level fixed gear bike.

Shipping, handling & boxing charges are a different story...

I have nothing to do with Applecart, and I'm not defending him. It just seems $100 for a decent old steel fixed gear is not that unreasonable.