zero zilch nothing, use past sales, and prices domains are selling for at auctions, as an indicator, estibot is a easy way out, just because you can type in a domain, and get a number does not make it valid.
past sales at sedo:
onlinevalut.com sold for $1600 esitbot says worth $80 .. total bs
funnyties.com sold for $2000 esitbot says $100
and so on... the market sets the price, not estibot.