Looking for Death Note production art

I know it's a growing rarity these days, but I am hoping to add onto my collection of original Death Note production art/layout sketches/storyboards. My luck hasn't been too great on the recommended auction sites as the best I've been able to find are photocopies of settei sets. If someone has better sources, it would be much appreciated.

Likewise, if anyone happens to have any they are looking to rehome, I'd be interested in hearing your prices/ballparks :)

Thanks very much for your time.

It's been a while since I've checked but there's a Japanese seller that has some hanken artwork from Death Note for sale. These images were used for the DVDs and for other products. They're a bit pricey ($990-$1220 not including shipping and Paypal fees), but there is some artwork around. Just google 'Death Note hanken' and it should be the first listing. I've purchased from this seller before and they are very reliable.

Other than that, you might want to keep your eye out for conventions. There are several conventions that have close ties to Madhouse, and there may be a guest that worked on DN that you could get a sketch from.

It's good to hear that seller is reliable, so thank you very much. I'd actually been entertaining trying to purchase one of their pieces, but was hung up on trying to find someone who'd dealt with them before. :)

Conventions, sadly, aren't in the cards for me since my health prevents me from traveling much, but maybe I can convince a friend to keep an eye out for me