Dear fellow NGCers: I am in a bit of a quandary over pricing between PF 63 and PF 70. I contemplating purchasing a PF 70 coin on an auction site. The PF 63 price is listed as around US$35. The seller is asking $450, which to me seems extraordinarily high. Unfortunately, there is no listed price for this particular coin in PF 70 grade, so I do not have anything definitive on which to base a decision to pay anywhere close to this price. If anyone knows of any resources I could use to determine what an appropriate PF 70 price would be, I would really appreciate it.