If it's in good conditions it can cost 0.5 btc or a bit more, but you need to show some evidences of your product. Hard to use it as collateral, you would need to send the iphone to the escrow to use it as collateral.
There are taxes to send it, you need to deal with the buyer, it's hard to say with sure how much it will exactly cost. Search for the average price on google before sell it. Since both parts agree, it's ok.
What 0.5?
he is talking about iphone which is locked in icloud do you think how much to unlock for icloud?
if you get iphone icloud lock that can not be easily unlock in cheap price you can unlock it but you must pay 0.2 equivalent of $200
There is no cheap icloud removal.. the price of iphone is not fair in my own opinion..
however did you ever remove the icould before?
i don't think anybody can make it happen , which means the iphone will be useless ,
someone here sell their locked iphone for 20% of original price ,
so of course that price too high.