For $80 locally, I picked this up and couldn't be happier. Three trays that each hold 312 5/8" marbles (two per compartment) and a deeper bottom tray for bulk marbles.
Primary con is that since the marbles "wiggle" in the concave slots, you can't position them ideally and keep them in place. Pro side effect of that is a really neat wiggling marble sound when you open the trays.
Don't think I'll be putting glass killers in here except maybe shooters, but the agates feel very right displayed this way.