In a sure sign of a maturing, profitable marketplace, Jupiter Research’s Gary Stein has speculated that the sale price of RSS reader site Bloglines to Ask Jeeves was between 35 and 50 million US Dollars.

This compared to Google’s purchase of Pyra Labs, the company behind the highly successful Blogger service, which was rumoured at the time to be worth around $7.5 million US Dollars.

If true, the price indicates a growing value placed on Blog related firms as interest in the growing blogging market place continues to rise.