I'm very glad that she doesn't want to take advantage of people, and wants to offer a quality product for little money. I, too, love knitting, and I refuse to charge my close friends and family for knitted items because I want those to be labours of love.

It saddens me that your fiance does not value her work, though, and I will point out (somewhat selfishly) that it does a disservice to all the other commission knitters when one knitter (or many, as is the case!) undervalue their work.
Becoming accustomed to the cheaper hose, those who request the commissions think they are being taken advantage of when a higher price is quoted to them--a reasonable price, for the work and time involved on the knitter's part. As noted above, $10 or less per hour is hardly an appropriate salary for the time and skill of an artisan, and your fiance deserves credit for that (especially if she holds the world record for knitting, as it seems she does.)

(Also, props to her for knitting them two-at-a-time, presumably on the same circular needle using the magic loop! I may be a bit biased, but it truly is the best way to knit a pair of socks!)