Seller Carry Back Certain % ???

Seller Carry Back Certain % ???

Got this from craigslist.com. "OPPORTUNITY KNOCKS!!!!!!!!!!THIS IS A 2 FAMILY WITH ADDITIONAL INCOMES,SITS ON 5 LOTS,2 CAR GARAGE AT DEAD END ST.THE PROPERTY IS TURN KEY.FULLY RENTED.GREAT INVESTMENT PROPERTY OR LIVE RENT FREE.BRAND NEW BOILER SYSTEM 3 ZONES.OIL.
GET IN WITH NO MONEY DOWN,I CAN SHOW YOU HOW! THE SELLER WILL HOLD FINANCING FOR A CERTAIN TIME AND PERCENTAGE OF THE MORTGAGE.YOU CAN GET INTO THIS PROPERTY AND HAVE A POSITIVE CASH FLOW,WITH NO OUT OF POCKET COSTS.THE SELLER WILL CARRY BACK 10% OF THE PURCHASE PRICE TO MAKE IT EASIER TO PURCHASE"".

Correct me if am wrong; is the seller going to reduce the price 10% of the selling price? Need some help and advice here it sound like a good deal.

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