The Trade Offer gave me an error, the window closed immediately and now it says the trade was successful!
There are some instances where you get an error similar to: »There was an error accepting this trade offer. Please try again later. (42)«, but the Trade Offer will still be completed successfully.
You can check your Inventory History for your recent trade activity.
Trade Offer
Auto-Sell Hats
Automatically sell up to 100 of your eligible hats at once.
Don't worry: we won't take special items, including painted, low craft numbers, special levels, spells, killstreaks, etc.
Autosell Cards
Automatically sell up to 1,000 of your eligible cards at once.