Something to think about if you can't find an agent is to reactivate and hang your shingle at a 100% commission broker like Elite Tx.

Touch up trim paint, missing section of shingle where we took out a window, attic closure , front porch posts.

Some vinyl flooring and of course those asbestos shingles that a lot of houses still have on the exterior are common.

I looked at one recently that was wood shingle siding upstairs, half rotten with peeling paint & 5 different types of floors downstairs, including painted plywood, and the floors weren't level enough to have any reasonable hope of re-covering with out substantial cost & work leveling the whole thing out, the joys of old houses on sandy soil.Good Luck 

Here's some stats: 2000 square feet, 3 bedrooms, 2 bathrooms, 2 car garage, roof is aslphalt, exterior is cedar shingles.

There were a few items that were identified.Live knob and tube wiring throughout (Google says ~$15K+ problem)Insurance concern (higher premium)Fire risk (Attic has fiberglass insulation over K&TExpensive to removeWarping of roof shingles due to lack of proper ventilation in attic (Google says ~$5-10K problem)Need to replace / repair roofNeed to address ventilation issue1 furnaces and 1 hot water heater are at the end of life (Google says under $5K problem)Known prior to inspection, so I'm comfortable with this.My intent is to work on getting quotes from professionals for addressing these issues and to go back to the seller in regards to the K&T and the roof.

7. are there asbestos shingles?

Ventilation is key...not only in naturally cooling you home but, without it, your shingles will age prematurely.  

My budget for purchasing homes is $20,000 each including the moving expense if possible, this is the top price I will pay and only vinyl siding and shingle roof will do, also it must come with central heat & a/c and appliances.

One section of my building needs to have the shingles replaced and I will be using a contractor to do that job (due to the height of the roof).