A couple of weeks ago, one of my favorite sellers on the flea had 2 rolls of proof silver Rosies up for auction. Separate auctions. I watched, but did not buy. I don't collect dimes, but was tempted. One year was 2007s and another was 2008S, both rolls proof silver. One roll went for around 290, the other went for 300. Did I miss a good deal for proof silver? I stayed on the sidelines.
I think you should have bid on the 2007-S roll. You would have $280 in melt value (It's a $5 roll right?) plus you would have the value that comes with it being a proof. With the way the silver market is trending, you probably would surpass how much you paid for it in melt value alone. Plus, you could sell them individually, at a slighty higher price. Littleton Coins prices individual 2007-S proofs at over $35! (Though they always overvalue their coins when selling them) If I had the money, I would like that chance to invest.