Bad luck is...

What game?

Shit happens.

Bad luck indeed

If this was a giveaway that you've won, please report it in Support. If it's related to SteamGifts or SteamTrades, I will take care of it.

Oh its bad luck to be you
Don't think for a second its not true
When your life is run amuck
You will see that you're the schmuck
Oh its bad luck to be
Really bad luck to be
Nobody could disagree
It's a freakin' guarantee
Its bad luck to be you!

But on the bright side Steam support has restored all the items you lost in the trade =)
At least that's what they did for me.

is the new scammer strategy, buy a game, trade, wait until game be traded again or added, revoke paymment and won.