I have an A4 Ultra Bass, A6 Ultra Guitar, and an A8 Mandolin. They are awesome! You won't regret buying one! Here are the listings of sold A5's on eBay to give you an idea of price. Godin A5
I just put D'addario tape wounds on my A4 and it is incredible! I had it set up at my local Bass place, and when I picked it up the owner confessed that the employees couldn't put it down. He said it was the most played bass in the place.
On a side note, the Godin A series instruments attracts an incredible amount of interest from other musicians. I've had a tremendous number famous musicians strike up conversations with me after they've seen me with one of them. (you wouldn't believe me if I listed them)