If a property is adequately marketed and does not see any interest it is because of an issue with one or more of three things; 1) Price, 2) Location, and 3) Condition.
From a little research and as pointed out by Mike in a previous post you are priced about $10,000 above what other comparables are currently selling for. That alone will cause your property to move slower, all other factors being equal.
Since the location cannot obviously be changed that leaves condition. Do you know the condition of these properties? Are they sitting empty where dust and mildew may form to present a less than clean and healthy environment? Do they possibly smell? All of these conditions can exacerbate the situation.
I personally don't think seller financing is an issue, since there are some very good government incentives for first time home buyers at much better rates. It may appeal to buyers with less than good credit, if that is part of your financing offer, but that gets into a whole another set of potential issues. Especially if you are looking for legal representation where the deals may look shaky to an attorney.
My recommendation would be:
1) Have a reputable home inspector go through these properties for you to determine if there are any issues with the "condition" of the property. If there are, fix them and make sure the property is presentable for potential buyers.
2) Reduce the price to about 2% to 4% below current market pricing, unless you are willing to price at market and continue to wait for the right buyer.
3) Not to sound clichÃ©', but you really need to hire a local Realtor to sell this property. Itâ€™s an obvious buyer's market and unless you have something to standout about your properties they are getting lost in a sea of other "for sale" properties. A local Realtor is also going to have a relationship with local closing attorney's to help get the deal done when they do locate you a buyer.