39. In view of the foregoing discussions, writ petitions succeed and the orders impugned in the writ petitions are liable to be set aside. Though a reference made under Section 47-A of the Indian Stamp Act, 1899 is found to be not valid in the eye of law, now directing the sub-committee to fix the new market value guideline for the properties which are subject matter in the deed of exchange in the considered opinion of this court would not serve any purpose at all as the market value guidelines are not the actual market value. The guideline value is only a guiding factor and it cannot be the real value or in other words, the guideline value fixed by the registration department is not final but only a prima facie rate prevailing in an area. The term “market value” has not been defined in the Indian Stamp Act, 1899. It is, however, settled law that 'market value' of the property shall be estimated to be the price which such property would have fetched or would fetch if sold in the open market on the date of execution of any instrument. The guideline value fixed by the registration department, as already stated, is not final it is only a