I don't really know how this works--this is my first time dealing with CWs. I know I can buy it from 's CW shop for CSC but I don't have quite that much--I thought I might post here and see if anyone had this item, and would be willing to let it go for less--CSC, or a combination of CSC and pure? I also don't know how to determine pawn shop prices but (I suppose if possible) I would pay more than that to you!
Generally CW shop prices are about the same as "slot" prices, but people who no longer use their copies of certain CWs tend to sell slightly lower than CW shop prices. Pawn shop prices don't really come into play unless there is a copy in there. If someone with a copy is interested in selling theirs, I'm sure you can find it for cheaper than shop price, but if no one is selling a copy you may need to buy one from the shop. You could probably also approach about seeing if she'd be able to sell it for some combination of CSC and pure. It never hurts to ask. :)
I'll ping for you maybe someone has a copy they're interested in selling. Good luck buying!