I would love to come across a deal like this, granted I was in the secure financial position to allow my money to be tied up for the foreseeable future.
Although, if you're getting brass for the price that the Diamond K Brass is selling them for, I'd pass and wouldn't even second guess. Brass prices are down currently, so that must be a factor.
How many drums are we talking here? I have always been a fan of buying very large bulk amounts of brass, shooting, keeping, and giving/selling what I don't need. I have met some awesome guys this way who are people I still shoot with. Is there the opport to make some cash on the side? Sure! But make sure to know what you're buying and who you're trying to sell it to first. Forums won't give you top dollar, but GunBroker takes a cut from every sale.
Worthless $0.02 maybe, but figured I'd chime in!