The grantee of a unit shall be jointly and severally liable with the grantor for all unpaid assessments against the latter for his proportionate share of the common expenses up to the time of the grant or conveyance, without prejudice to the grantee's right to recover from the grantor therefor. However, any such grantee shall be entitled to a statement from the manager or board of managers, as the case may be, setting forth the amount of the unpaid assessments against the grantor and such grantee shall not be liable for, nor shall the unit conveyed be subject to a lien for any unpaid assessments in excess of the amount therein set forth.