I'm lvl 4 too. Not all players are eligible for negotiations, so if you can't submit an offer, then nobody can. I did read somewhere about which players are open for negotiation but I don't remember the details, it's to do with their skill level.
Look at the negotiations list on the transfer market and you'll see players you can bid for, or just keep looking at the players you want until you find someone you can make an offer for.