I've done both. You can have a box for them and I think plastic bags around them. Some folks who bought mine didn't want a box. Give them a choice. I have trouble finding boxes that are tall enough to completly cover them. Good luck. Let us know how your sales go.
I had one lady strap hers in the seat belt. It was funny but worked!!

I just wrap mine in bubble wrap. They usually carry them away like you would carry a bouquet of flowers. Good luck and show us pictures!
Ann

Best of luck with selling and remember to factor in costs of packaging to the selling price. Unless you can get bubble wrap and large boxes free.