best website to get accurate estimate

[Mel C.]

I bought a house thinking that I'd add a second floor, but realized that it'll take too long. So now I just want to rehab it using existing footprint. Not sure at this point if I sell or rent.

Before going to my agent, I looked at the various websites to see what they state as the value of the house.

For my purchase price of 160k, closed on April 2017, the sites show the following estimates:

realtor.com = 263k

zillow.com = 243k

trulia.com = none stated

redfin.com = 231k

Has anyone done a comparison of these websites vs what their agent informed them of what the value is? Was it close / too little / too much?