Is it your size? It looks nice and hardly ridden, it is probably about 15 years old or so.
If it is a friend, I would give him $300 for it as it looks to be in perfect shape, apart from the handlebar tape, and it has the Ergo-shifting. Do you know what he originally paid for it?
If he is a friend, he will probably not mind lending you the bike for a week and seeing if you like it. Then you can talk price. I use this system with my friends and it works well-----all but one of my friends rides a bike that I found for them.