Keep in mind that even if you are not concerned with a test, such as radon gas, that potential future owners may not share your acceptance of the hazard. Include a contingency that the home must be appraised for the sales price or higher. This is, in fact, required by the lender. Make sure that if the home appraises for less than the sales price, you are not required to buy the home. Add a contingency that an acceptable home inspection is performed, and this is usually paid by the purchaser.
Some states require buyers to fill out a seller disclosure stating all the defects.
If there are defects that will incur expenses over a certain dollar amount, you may include a statement in the agreement that the seller must fix the defect, or void the contract. Make sure there is a mortgage contingency, which states that you are only bound to purchase the home if you are approved for a loan. Furthermore, put a cap on the interest rate you are willing to pay. Fixtures, trees, shrubbery etc. Understand what a fixture is considered, typically referred to as an item attached to the home with permanence.