Procedure for payment for purchasing a resale flat.

I proposed following payment plan to seller for buying a resale flat: 1. Rs 5000 will be paid and documents will be collected for scrutiny. 2. On a positive scrutiny, sales deed will be prepared by paying 1% or 2% of property value. 3. Rest amount will be paid at the time of flat registration after loan gets sanctioned. But Seller proposed following payment plan: This is a ready to move and already registered flat. Amount wise we would like to go as follows. Hope will be okay with you. 1. Booking amount 1L to hold the property for you. This amount will be completely refundable. 2. Agreement of sale amount 2L. 3. Remaining amount on date of handover registration. Now i am not sure how fair it is to pay 1 Lk before scrutiny. Rs 5000 is worth to take risk but 1 Lk does not seems so in case of unsuccessful deal due to any reason. Please suggest.