We do Blogger - WP transfers and our current price is $54.97. You can read more in our store. We have transferred content for many bloggers and never had a problem with broken links or anything like that.
Are you using a custom domain now on Blogger? Making the move can get your pr to go down yes. But I would not worry to much about that and instead work on building the blog even more and make it better and market it. The move will benefit you in the long run though.
Feel free to send me an email or pm if you have any questions.
That is a great price! I looked into this a while back and someone wanted to charge $150. But believe it or not it is quite easy to do it yourself. And there are plenty of video tutorials on you tube. I was so proud when I made the switch all by myself. Good Luck!