Mainz 05 is negotiating with Como to sign Stefan Posch permanently. The Austrian international has established himself as a key player in the second half of the season and has made 20 appearances for the Bundesliga side. Posch is currently part of Austria's squad for the World Cup. Since no purchase option was included in the loan deal, the two clubs will have to agree on a transfer fee. A fee in the mid to high single-digit million range is considered realistic for Mainz 05.