Improper Format INVALID TITLE- STEAMID 64 GOES HERE

Victim:
| steamname: Marlborito |PT|
| steamID32: STEAM_0:0:20547364
| steamID64: http://steamcommunity.com/profiles/76561198001360456
| customURL: http://steamcommunity.com/id/Marlborito
| steamrep: http://steamrep.com/profiles/76561198001360456

Scammer:
| steamname: wiLd
| steamID32: STEAM_0:1:13192743
| steamID64: http://steamcommunity.com/profiles/76561197986651215
| customURL:
| steamrep: http://steamrep.com/profiles/76561197986651215

This guy sent me a trade request askng for keys, and i accepted but he offered 67:13 keys and i though that the value was correct since i was selling some keys for 5.33 refineds in outpost http://www.tf2outpost.com/trade/10861628 .
I know that i should haved confirmed before the value, but i have a defect that i trust people and since i wass selling for 5.33 only i thought it was the correct value.
When i realized it was already too late, i tried to cancel the trade but too late.
When i told him i asked to return the keys and i return the refined or just pay the difference.
Then he just said "a deal its a deal" and deleted me.
Is there nothing you guys can do to help ?