My LCS has a range of values for bargain bins: $20, $15, $10, $5, $2 and $1. Don't do $1 or 50 Cent bins any more, - too much rubbish to dig through.
Having said that about low value bins, they are still the best way to build date and mint marks sets of low denomination coins.
I have Cherry picked my way through the $20, $15, $10, $5, and $2 bins, 3 or 4 times a year, for the last 40 years
. The efforts of this type of cherry picking have resulted in a desirable collection of about 1,000 World coins, of all eras and cultures. I still have them all.
In the early days, I was picking out nice condition Roman denarii and small Greek silver and some nice Roman bronzes, (perhaps 10% of the finds), the rest very nice condition World bronze and silver, up to crown size.
Only very poor condition ancient coins are found the bargain bins these days.
CL: You have achieved a value multiplier of something around 5 to 1 catalog value to purchase price,
which is around what I have always aimed to achieve for myself.
helps if you have a good feeling about what the catalog value may be of what you are considering to buy.
That only comes with many years of cherry picking experience. It helps if you can maintain a lifetime interest in numismatics - that can be aided by watching the value of your collection grow.
A big bonus: when you research your collection as it grows, you get to learn a lot about World history. That can be very satisfying.