I'd get that bike, looking like it's a bargain for a first bike to me. Few guys on here would be able to tell you the year of the frame and then the geometry but £450 for what appears to be a decent fourplay is a good deal in my book. Make sure the frame isn't damaged, dented or has welds cracked, make sure the brakes work (he does say the do), find out the make of the brakes. He also says it has a new hope rear hub which is great. I think anything else is relatively easy to swap out or replace if it doesn't suit you.