I've bought a few items from Nathan over the years and have always received good service, I knew that I was buying from a guy running a hobby business rather than a full time operation so my expectations weren't high.
I dont know his circumstances but I suppose some health conditions may creep up on you and before you know it you're behind in work/life and he may not have had the time to inform customers or make changes to his website. I had my appendix removed a couple of weeks ago, a routine operation with a 1week recovery time yet I got a little behind with things...I can only imagine how a more serious health issue would have impacted me.
Nathan, I hope you get well soon mate, concentrate on getting better and I hope you stay part of the Amiga community.