Accepting payment through demand draft and tax

We are planning to sell our property and buy another at a different location. The potential buyer wants to pay by multiple demand drafts - issuing one demand draft as advance booking and issuing two demand drafts at the time of registration of deed. If the property transaction completes, we plan to but another property. My questions are: Is it safe for us (seller) to accept multiple demand drafts or should we insist on single demand draft at the time of registration? Since we do not know who has deposited money to buy the demand drafting - does this make the transaction through demand draft unsafe? Is RTGS OR NEFT better than demand draft. We plan to buy a property of nearly the same cost or slightly higher.. as we are moving to a location where cost is more. Hence, we will not gain any capital from this transaction. But do we still have to pay tax when we sell property? Can this be refunded? If you can in addition give me a website link to other precautions for sellers of property, help is greatly appreciated