I've quickly figured that out. I;ve went to buying cull or junk silver coins. Since I like old U.S. mintage, that is what I look for, but like you said, sometimes those can be expensive. However, I have been able to find a few good deals, just have to keep my eyes open and look real good and be quick because they don;t last long at all.
It is so hard to stack US Constitutional coins. They are running out of BUs and if they are available, they are priced higher than newly minted ones. I buy them when they are available at a reasonable price.
!PIZZA
oh, if I got something in BU condition I would be too tempted to add it to my collection instead of the stack. That why I am looking for the yuck culls instead. That way I am not really attached when I sell or melt them.