I agree - and you're not going to have access to those valuable uncleaned coins unless you have contacts at the source. If you're
buying uncleaned coins, it should really be because you enjoy coin cleaning, not because you
hope to make a profit. I'm not even convinced that
buying uncleaned is a cheaper way to collect than
buying cleaned coins (you're going to get lots of duplicates of the common
types, and probably find that at $2 each you're spending more
buying uncleaned hoping to find some particular
type than if you
had just bought that
type cleaned in the first place!).
You could make the hobby partly self-financing by
buying and
selling the occasional coin when you see the opportunity, but more than that would really require that you become a dealer ... willing to keep an inventory of coins that you bought
cheap and can afford to hold until they sell at what you know they can bring. I hate to think how much inventory you need to keep to be able to make enough regular sales to have much appreciable profit!
Best bet is just do the hobby for fun, and realize that it costs like anything else!
Ben