On looking at it first, it seems nice. I kinda like it. But when I look for other .design sales on namebio.com, I don't see much .design sales recently. But who knows maybe the boom in .design domains is about to come.
At the moment I think the reseller value could be probably less than $600 looking at other past sales. But it's just my opinion. I think maybe end user sale could be much higher if it ends up in the right hands.
Good luck