If the player is co-owned, you will have to make 2 seperate bids to the clubs that own the player to but that teams share in the player. This option is available if he is co-owned, but the only reason that the "make an offer" option isn't there is if a player is on loan to a club where a fee is involved.
i just bought hemsik co owned by inter and napoli. I had to make an offer of 10 mil to inter and ten mil to naploi for the deal to go through. Efectively when a tem aggrees your buying there half of him
you just make an offer like any other pleyer but there should be make an offer plaermo and make an offer roma if not then i have no idea but thats all i did for hamsik
hmm weird! still not working for me.