I just did my first TF2 "trade" and oh god I dont wanna go through that again..
First I exchanged a "Vintage Killer's Kabuto" and my "Genuine Aperture hat whatevs" for 4 mann co keys. In order to do this I had to make a post in a subreddit, pricecheck on the stuff, talk to Firehead who's more into the whole "trade scene" (thanks duder), ignore lowballers who wanted to give me shit for them..
Then I added some dude who barely understood me and got him to send me 4.4 euro (roughly $5.5usd) in exchange for those keys.
Thanks to paypal fees and euro conversion I ended up getting $4.48usd
So basically I had to add 2 random people and have "trust" conversations with them over who would send what first and whatever, talk about "rep" and whatnot, in order to get 4.5 bucks for two hats (just wanted to add 5 dollars to the summer sale savings and I dont really care about hatz)
That shit was so not worth it. Dudes going all crazy over scraps over there, arguing over cents.