1st of all please stop buying domains based on some silly services which estimate a domain value.
Humans are going to buy your domains not machines & bots, as well all agree machines are dumb and follow simple logics written by humans they do not have an intellegence of their own. Simple question is to answer yourself while buying a domain is
1) Can i remember this domain name easily ?
2) Can i build a website around this ?
low $xxx but tough to get an end buyer, as it's a tough topic to develop anthing.