It may not be that simple, anymore. Some states have enacted law that requires disclosures in writing regarding the condition of the house and property. Some states go even further and require additional disclosures regarding nearby landfills and other stuff. California comes to mind as a state requiring a bunch of additional requirements. Some cities even require their building inspectors sign off prior to close.
If the house is in town, pay a visit to the lcoal building department and get copies of all permits applicable to the property. Ask them to show you whether or not they've had final sign-offs. You do want to avoid a property with an unpermitted room addition, or something else major. Lastly a big hang up can be sewer hook up. If the place was once on septic, do have a plumber come out and do a die test. EVEN IF the city building department says it's hooked up...
Do have a competent home inspection, and not one from your cousin Ralph. Generally a buyer's expense. If it's in an area where termites are a problem, make it contingient upon termite inspection and the seller doing any needed repairs.
Have a Home Protection policy (generally seller's expense) covering things like heating and AC, plumbing and other stuff.
Make the transaction contingient on getting a loan to close. Use a standard amount down like 10% or 20%. If you put more down, include this phrase: "contingient on property appraising for purchase price" IOW, the lender's appraisal opinion of value protects you from paying too much.
Lenders also require things like title insurance, recorded deeds and several other things that also protect the buyer.
If you are going to use seller financing, there's a bunch of additonal situations to beware of.
Finally, it's free to ride around with a Realtor and look at other properties. It will give you a better idea of value regarding your intended purchase. If you find you like him and still want to buy the FSBO (for sale by owner) ask what he'd charge to chaparone your transaction.
If the house is in the country on some acreage, do seek professional help.