EBay doesn't require a store. You can sell them piece by piece.

Yes, you can and ebay gives 50 free listings per month.

And charges 10% from the proceedings including shipping. Plus Paypal takes its chunk 2.9%+30c. Plus you need to provide photos and description, you need to communicate with the customers and return the money if your priority box was dropped from the third floor - or ran over with a fork lift... so there is work involved and potential losses. Not a rocket science though.

And part of it - knowing the current prices. Right now there is 2 sets of leaves of Rose Bouquet and 4 good size plants available on ebay, I doubt you can sell Rose Bouquet starter for $25.

Thanks for all your comments! Maybe just keeping them and giving as gifts is the route I will take.