I've toyed with the idea of selling my 'junk' silver and buying some ASEs, but the markdown is too steep for me, particularly the 40%. The best price I can find locally that someone will give me is $4.00 - $4.10, and that's just not high enough, frankly. On eBay the prices are better - I saw about $4.40-$4.70, but when it comes down to it, the only reason to trade in junk silver (again, particularly the 40%) in my opinion is to save on space. From a prepper mindset, I think the 40% are actually pretty useful, as they have just over 2 silver dimes worth of silver, which would be great in a latter-stage barter economy where precious metals are king again. Again, the weight and size of that extra copper is the only drawback, in my opinion. I have been thinking of trading a lot of my 40% for some gold, though. MUCH more value-rich by weight, and I have been wanting to put a foot into the gold market. I know it's overpriced, but with how the Fed is printing paper, I doubt it'll be going down, as a rule.
Anyways, that's my 2 cents - YMMV.