Gosh, you're a philosophical bunch! Laws of diminishing returns, Rawlsian economic systems. Where on earth did all the astronomers go?
Got a phone message today (but I was out). Apparently the 15 mm eyepiece might be incorrectly priced on Andrews website. I'll post again when I've clarified the issue.
In the meantime, continue debating the aetherial and ineffable. I enjoy it.
Cheers
Brian.