OK, this is the score, reading between the lines (specifically La Repubblica) the reason for Lotito making the illusion of hawking Kolarov to other clubs is because we wish to pay in two installments (as is common practice in inter-country transfers) whilst an Italian club would have to pay in one go (as based on FIFA rules for intra-country transfers).
Lazio's main problem is that the players that they want (Antonelli & Aquafresca) are both at Italian clubs (Parma & Cagliari respectively) and they would not have the necessary money to buy them both with the €10m that they would initially receive from us.
It would seem however, according to a Lazio fansite (I have looked on La Repubblica website, and cannot find the story so it may only be in the printed version), that we have finally agreed €10m upfront & €8.5m in 1 year with them, and that Kolarov is due to take his medical on Monday.