Comic Link

Have any of you guys ever purchased anything or bid on anything at Comic Link? I have to admit I've never looked at their site until a few days ago and I've been finding myself looking at it quite a bit ever since. In terms of quality stuff, they seem far superior than a site such as Ebay where you seem to wade through endless crap before you find a good book. I also looked at Heritage Auctions, but at first glance, I found them to be looking quite expensive. I may not be familiar enough with either one of them and perhaps the perception is far from the truth. But as it is now, I'd like to learn a little more about these guys so I thought I would check and see if anyone else has experiences with these guys and what your thoughts were.