In terms of paying off the mortgage, you’d have to work directly with the lender to make sure they get paid and that they discharge their mortgage. If you’re unsure about how the process works, then honestly – it probably is best to just work with a title company. It may cost a few hundred dollars more – but for a property like what you’re describing, that’s what I would be doing anyway (I use title companies for anything in excess of $10K). They will take all the guesswork out of this process and make it WAY easier to get the job done.
Comparables for land can be trickier than for home sales in your area. Although the assessor's valuation on your taxes can provide a starting point, consider factors like whether your property has utilities to the property line, views, zoning and any preapproved building plans to determine its worth. Location is always one of the most critical factors. In San Francisco's Pacific Heights area, for example, a buildable cul-de-sac lot of less than 4,000 square feet can sell for more than $9 million.
Land contracts are useful instruments for sellers who are selling a home and contemplating carrying the financing for a buyer. It gives sellers a built-in income and generally a better interest rate than rates offered on money market accounts or certificates of deposit. However, a prudent seller should take steps to protect equity and ensure the buyer can fulfill the terms of the land contract.
Soil Terrain and Vegetation: Most small landowners will prefer a mixture of hill and valley, but level agricultural land is usually more expensive than hilly ground. However, if your property is smaller, say less than eighty acres, there will probably be a better market for the mixed terrain that includes level bottomland and forested hills. Likewise, the best overall market exists for small properties with a mixture of forest and meadow as opposed to all woods or all field.
I agree with Ellen Chung, finding the right type of buyer to target is very important. Also, you should consider the amount of time you have to sell the land. If you are short on time due to back taxes owed or other financial obligations, your best bet may be to talk to a vacant land investor. You will not get the full market price for your property, but the typically can pay cash and close quickly.