Well I actually did (was only 4 luck mats, shame on me ^^) and I've seen people selling like 2 luck for 1 pd... I agree to say it was really underpriced though, it was not even an acceptable price. If I had to explain why I'd say that :
1) Yes 1:1 would be a good price since there is HH and only for that (imagine hunting luck material without HH, personally I never ever even found one)
2) However HH is rare enough to make luck mats more valuable
3) It's mainly about wanting to waste a HH to make luck material or to hunt something more interesting, knowing that even if you're "THE" badass of luck mats hunting, you will barely be able to make 15 luck materials in one HH. So if you sell it 1:1 (15 pds) when in the meantime you can hunt RR (50-100 pds) or whatever your ID allow you to hunt... Even without talking "price", the usefulness of the rare items and the rarity of HH makes you want to hunt something else.
4) There is no quest or event who make it "easier" and this is normal mode so the exp earned is meaningless.
That said, 3 pds seems a good price.
That's exactly what makes the price =/ Look at the over price of post lately. Therefore, I doubt there is even 5 people out there with 30 luck materials (and ready to sell it 1:1).