Absolutely. But then the seller has their money tied into the property for potentially years and you're now in business with this complete stranger (e.g. if they stop payments you're responsible for chasing that down, if the property burns down they may just run off into the sunset, etc).

Unfortunately some people are forced into that arrangement simply because otherwise they'll never be able to offload it. It is something to keep in mind when getting into these types of property.

PS - Keep in mind that if you receive cash for this property you could use it as a downpayment on another, without getting all of the cash up-front you'll have to take out a bigger mortgage against your next property which will cost you money in interest over the life of the loan. So even ignoring the administrative hassle of seller financing, you're now also out of pocket.