| Just stopped by Costco in Kansas City today. They had different types of Peonies packaged up for about $13-$14.
You could choose:
1) 4 Immaculee (didn't see but 1pkg of this)
2) 2 Bowl of Beauty, 2 Sorbet, 1 Raspberry Sundae
3) I can't remember the other package combinations..
They also had some Sarah Bernhardt and Mons Jules Elie mixed with other peonies. And then there was also a package of 6 roots (3 fragrant varieties 2 of each kind).
However, some of them were already sending up shoots in their packaged bag with some small leaves on the end. I couldn't see the root system of all the peonies, but some of them were the same size as what I ordered from Gilbert H. Wild. If you do buy any of these from Costco or another box retailer, select the heavier package as the root systems are probably in better shape than others.
4-6 roots for $14, not bad, if you don't mind planting in spring and being patient for blooms/healthy growth. | 
