Splitting Perennials...How do I get them home?

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We are having a street sale this week and I was thinking about splitting some of my hostas, lilies, etc and selling them. I split some 2 weeks ago and repotted them with the thought of selling them this weekend but they don't appear to be doing very well. The sale is tommorow, is there any way that I can split some more of my plants and then sell them bare root without replanting them into pots for the people? What is the best way to keep them alive without replanting them in pots? Any ideas would be greatly appreciated!