FC is a no brainer. A size 14 will go to a big dude who is likely a pro athlete. It definitely moved from the site in less than an hour at 5.75k yesterday. Bottom line is if you're the only/first in your size, and it's a harder to find size, you're going to have good luck. Let's say one person does come in lower than 6k... You still have all the way down to 4.6k to price it and get your same 3.7k you're looking at privately. They will go.
This is what I was thinking. I have a good bit of wiggle room when it comes to the price. Plus I feel like FC is the safer bet rather than meeting up with a guy I've never met before.