The way the OP's question is asked - yes, numismatic values are rising with PM prices as evidenced in the graph. But - I do not think numismatic values are rising because PM values are rising. Nor do I think that numismatic values will continue to rise.
You don't Doug? Why is that? I just remember the late 70's/80's and what they did there. My thougth would be that the flush cash in the industry would continue to prop up numismatic items until PM's went down and liquidity fell.
The numismatic values for Silver Proof Sets (2002-2007) are selling on eBay for well below Melt plus non silver coin face value. The is approx. 1.34oz of silver in each set. @$27/oz = $36.18, plus the face value of $1.06 (dollar, nickle & penny) yields $37.24 total value. I have been winning auctions @ $29-$34/set It doesn't appear to me that the numismatic value of these US Mint Proof coins is recognized. The 2007 sets include an additional 4 dollars so it's melt plus face value is $41.24 I have bought all the sets that I can currently afford. The two sets that arrived yesterday, a 2006 & 2007, look like they came direct from the mint. I paid $68 for the two sets, that is a 13.3% discount from the melt plus face value of $78.48 Today these sets have a negative numismatic value. I don't know why, but I sure have a nice collection. I'm hoping that the appreciating melt value will cause the total number of sets in circulation to decline, therefore increasing the numismatic value. In the mean time, I feel that this is one of the least expensive ways of acquiring silver. The cost of postage, if any, is partially off set by the 3% discounts (1% rewards rebate I receive by using my credit card, Plus the 2% rebate from eBay Bucks) . I have participated in over 300 eBay auctions and only had one seller who did not deliver the item auctioned. EBay refunded my total payment in two weeks.