I am very new to road biking and did a lot of searching and research on bikes for a budget of around $500. I know that isn't much, but I have never even been on one before, so...

Anyway, I was not happy with the idea of ordering online because of the intangibles, so I went to my lbs and found an older model Diamondback Master for a reasonable price. I had read a little about the brand and components this one has, so I got it. The problem is that I know NOTHING about this bike and can't seem to find any information on it. It is in pretty goood shape other than a few minor flaws. The guy knows how to service a bike well, so he has taken care of it.

I'm not sure how to post a picture (new to the site), but it is black, silver, and red.
Shimano STI shifters
105 components
Says 7005 on the frame
Aluminum body with carbon forks

Can anyone help me with more information on this one? Thanks!