Can you explain what you mean by "Sheriff Sale Homes"? Sheriff's sales are basically auctions where homes are sold that are being foreclosed on. Typically, at least these days, they go back to the bank because the bidding is so low the bank outbids everyone else in hopes of recovering some of their losses by listing it with a realtor. Even if the bank does not take it back, Sheriff's auctions are risky investments. You don't get a chance to look at the house before you buy, you don't get a home inspection, you basically don't know WHAT you are buying. If the home has a leaking oil tank, or a bad septic system, or some other major problem, bad roof, bad foundation, you are stuck with it, Plus you have to have a lot of cash to hand over at the time of the auction and have to come up with the balance within a very short time, so most mortgages are out of the question.
In my opinion, you would be far better off purchasing a Short Sale property or even a bank owned property (one the bank took back at the Sheriff's Sale). At least that way you get to see the interior of the home and have a home inspection done prior to purchase.