My buddy bought one last year through CDNN and it is really nice. He let me shoot a round of trap with it and it performed very well. He paid around $550 after shipping etc. I was blown away at the price and the level of quality. CDNN is running the 12 gauge at $499 right now. Unfortunately, I haven't seen CDNN run a Lanber 20 gauge yet or I would be all over one.
I looked hard fouryears back for a quality O/U at an affordable price and just couldn't. I eventually bought a slightly used Beretta Silver Pigeon that set me back a pretty penny. If the Lanber would have been on option at the time, I would have bought one.

Hope this helps,
MC2