Many domainers right now are jumping from buying domains to buying websites entering a new marketplace that may seem similar to the domain world but its not like that.
Before paying lots of money for a website you must do your research about it and check out if it actually follows the sellers promises.

Read a guide I ve made about researching a website that is currenty for sale on Latonas Web Property listing and Flippa marketplace and try doing the same about a website you might be interested.