Decent Collection

This is a silly discussion as there's no disagreement. With 5.000.000 LPs there HAS to be some good stuff. How could there not given the sheer amount and the fact that he also bought out entire collections. Even with 0.1% of it being rare it would mean 5.000 rare albums. So, yes, there surely will be rare, "cool", possibly even "mind blowing" things mixed in, but 99,9% will be dupes, disco cut-outs or field recordings of mating deer. But given the painful lack of focus or what one could call curatorial ambition of this guy, this is no collection. It's a vinyl graveyard.
 
A friend tells me "he bought the stock of Al's record barn in San Jose which had been going out of business for a long time and mostly filled with trashed records"

I think that percentage of rare records will have to be lowered to .01% or .001% that is, one nice rare one in ten thousand, or even a hundred thousand. How's that for a batting average.
 
With 5 million records, you couldn't sort out the good from the bad, in your lifetime. You would have to sort 300 records every day for 50 years, including weekends. if you started at age 20, you'd be 70 years old before you finished sorting. Or dead from boredom, more likely.