First off, your math is off. << She said a dealer offered her $40 a roll which would be 9X face>> If it is $5 in dimesper roll, and she was offered $40, that's ummm ... 8X face, right? But, back to your question.
I'd be happy to pay about 17X face right now, which is lower than they are going for on most sites. I can sell them right now on the nucleo site for 19.41 times face, so 17X is a decent discount. IN fact, if you want - you could buy them for whatever you can get them for. 10X face. 12X face. And sell them for 17X face to LOTS of people in a heartbeat. But, I think if you offer that low then you are low. granted, the dealer was low too, but I'm tlking on the BID it is 19.41X face, and she can find that out TOO if she loks. You don't want her to know and then hear you say 10X face. She'll think you are ripping her off. give her a good price, buy at a little discount,and be happy with that. that's my thought. :-)