@ar said
"Sacrifice in the sense of surrendering something valuable has no place in Thelema except in one very specific instance which most of us will never encounter in our current incarnations."
I disagree, T. Sacrifice has deep and profound place in Thelema, especially in the sense of surrendering something valuable.
Its key element, though, is that it is surrendering something precious for something even more precious (though perhaps not previously understood as such). - I was going to write about this in response to the original question, but passed on the opportunity because proper attention to it would require discussion of its relationship to attachment, surrender, valuation, and other related topics... and I just don't have the time to compose that essay properly.
Liber Legis gives some clues, though. Your p.o.v. is perhaps best reflected in Nuit's statement that (seems to say that) She requires no sacrifice. But the word "sacrifice" appears one time in each chapter of Liber L. It has something a little different to say each time.
One might also say that Thelema particularly abandons (as impractical and silly) the most common category of sacrifice, which is that particular form of bargaining that pays a stupidly high price for free merchandise. Aleister Crowley's life was perhaps the best example of this, since he started the path by offering all of his health, wealth, love, etc. if only he would attain fully. Whatever gods heard this were quite happy to accept the donation and provide him with what he asked for... which, however, could have been his without paying the price. (There remains only the question of whether his psyche was so constituted that he could have accepted the deal without paying the consideration. I suspect there were karmic elements at play in his case.)