221It must be noted that, in so far as, in accordance with the case-law, just one of the factors to be taken into consideration in order to assess whether there was economic continuity is not sufficient in itself to rule out extending the recovery obligation to an undertaking other than the initial beneficiary of the aid in question, such as, for example, a sale price at market price, the Commission does not have to prove that there was no such sale price in order to conclude that there was economic continuity and the lack of guarantee of such a sale price may be taken into account in the Commission’s overall assessment of the various factors under examination.