I have contemplating this a lot recently. I have not seen a shift in Google rankings like this in the last 10 years. The change in top 10 placements has been staggering for many key phrase searches. I have seen many sites go up for sale that are showing significant drop in rankings and traffic.
Adsense sites seem to have taken the biggest hit. I guess it makes sense, there are 8 catrillion (I made up a number because I don’t know the real amount and don’t want to be quoted as if I did know) adsense websites out there. Many businesses are built on teaching people how to make money building adsense websites. Google had to do something to protect its results because for the most part Adsense sites don’t add value to the internet from a user standpoint.
The point is, with so many sites losing rankings and traffic and by default also revenue is now really a good time to be buying up websites? It seems to be that there is a lot of risk in doing this. You could buy a site making $500 a month and then tomorrow it is making half that or worse. It is not likely that if a website owner actually increased in traffic recently and is making more money that they would be putting a website up for sale.
So what you have to choose from are for the most part sites on the decline. Now if they have hit the bottom of the decline and are going to work back up then now is the perfect time to buy. If they are declining because Google doesn’t like those types of websites, then you shouldn’t waste your money. You are going to have to make a tough call and decide if you want to risk it.
When buying a site, only valuate the site on what it is doing right now. Also look at the last 3 months of trends. Is the site maintaining? Is it growing? Is it declining? If you really are determined to make an offer, make an offer that you feel very confident you can recoup quickly.