I got to shoot one of these during a summer biathlon competition. It's a nice solid rifle, but I concur about the sights because a number of people had problems with them during the race, me included. I just thought my accuracy went to pot because of my pounding pulse, but it was determined after the race that a couple of the rifle sights got misaligned mid-race.
No way I would say they are near an Anschutz, though. Some pros let me shoot theirs and it was a world of difference. Depending on what you're going to use it for, the biathlon/magazine kit will cost you extra. I've seen the base gun at $450, so I'd say your quote would be a good one if it came with the kit installed.
You might check out this place:
http://www.nealjguns.com/index.html
They have a used Marlin for sale as well as beginner Anschutz rifle outfitted biathlon style. The prices are comparable and it seems like a good deal although I have never dealt with the place myself.