No, we don't need another Google "rule." You can put anything you want in your title and description. Whether it will be effective or not is something to test.

You can do it but whats the point? Firstly any time you change the price youll need to change the tags and secondly wouldnt you rather someone actually go to your website and have a chance to persuade them to buy rather then never clicking your site at all because they were turned off by the price?

I'd reserve the title for something that they are actually going search for, the product. Unless you are optimizing for $19.95 it doesn't seem to make sense to use that valuable real estate on information that they aren't going to search for.

People that want to compare prices for similar items will probably use froogle or shopping sites anyway and not the regular search index.

We do not put it in our tags but we have the option to. If you did that, people might not click through to your site and read about the product if they see the price. The object is to get them to come to your site and read about the product before looking at the price.

If you want to compete on price, maybe place it in your title or description, just like many adwords ads.

I'm not to sure it's a good idea, and what if your price changes, adwords are easy to change, not search results.

I would rather use features, benefits and advantages of the product your selling.

One more thing about displaying or competing on price.

Someone always comes along and beats your price. If someone displays a lower price, you won't get the click (from people shopping on price only)

Price is an important issue on-line, but we found we can sell items for a "little bit more" if we give more information about the product then the competitors and guarantee same day shipping.

Money loves speed. Get the product to them the fasted and give them "all" the information about the product you can.

If you want to have a "we'll beat any price" policy. Knock yourself out.