Recently I came to know about free appraisal option in Sedo.com. I had tried this option for TimeSheetScript.com and it showed the appraisal amount as $1500 USD. But estibot.com is showing value as $0 for this site. Why this huge difference between this two estimations? Which estimation is appropriate?
They are estimates done by bots. If you want a real, and a precise estimation then goto a company which does the estimations by hand.