Never heard of escrow for skins on this site but I suppose anything is possible, mostly I imagine it would just be done on a trust level. I sold a steam URL to a level 200 account recently for BTC, still on my friends list but let me know if you want to be added on steam. I would doubt very much you want precisely my exact knife and I'm not in a trading circle but I can recommend a few places to read up on pattern FAQ for knives and so on
Whats your name on steam, my name on steam is Tomishkaa,
I would like to add you to the steam and to continue the conversation, to bring you into this world of skins