Curious to see how much a bag goes for, I know eBay is roughly $200-250 for a bag of 5,000 mixed dates and thats normally 40's + 50's.
Coins from this era would average about 16 cents for P mint dates. And I'm pretty sure 90% of the lot would be 1919 pennies.
There's a website that sells bags of 5,000 wheats for $219.95 but it says that they're all from 1930-1958. They also sell bags of 2,500 steel cents for $574.95. I haven't purchased anything.
If they were 40s and 50s I'd pay 2 cents a piece max. Nowhere near $1000-2500. - If you find a place you can sell them at that piece let me know...
separating 15,000 coins may take awhile x_x i suppose grouping everything by year first than breaking them down by mint