Buying an iCloud locked iPhone 5s?

I found this guy who is selling an iPhone 5s icloud locked online.
I emailed him asking if it was still available, and he said that is was.
If a purchase the item, I want to do it in a public shop or mall so there's no funny business.
I had an idea for him to sign an agreement, agreeing that the phone is not stolen and I also plan to voice record the transaction as evidence if it turns out to be stolen.

Can I get prosecuted if the police catch me in possession of the stolen device, even if I had no idea that is was stolen and I have the signed agreement?

Meet at a dealer, dealer can inspect it and tell you if its been reported as stolen or not.

If the iPhone is iCloud locked, what are you expecting to do with it? Remember, you can't bypass the iCloud lock… At the moment, it seems like you are about to buy a fairly pricey paperweight. Funny thing about that "agreement"… You're wanting it because you think the iPhone might be stolen. If you complete the transaction, you will have received stolen property. Legally, the iPhone can be confiscated by law enforcement and you still won't have your money back… You may not be prosecuted (not because of the signed agreement), but you'll still have lost your cash.

If it's iCloud locked obviously the original owner doesn't know where it is and probably wants it back. Plus you can;t do anything with it anyway because it's iCloud locked. Save the money and buy from someone legit.

And yes the police can take the phone if it's stolen and you will most likely take the blame. Anyone can sign a fake name

https://www.icloud.com/...ationlock/

Icloud locked means you are stuck, you can't get around it