I purchased mine this year from Bluestone Perennials and was very happy with them. They came packaged well and healthy. They are establishing very easily. By the way, Heuchera Spellbound has amazing color!

Do you have a Home Depot in your area. I have picked up a lot from them. Just purchased 2 in the last week.

Online I have gotten so that are reasonable and a good price from Santa Rosa Gardens
http://www.santarosagardens.com/

Did you know there is a Heuchera Forum?

Here is a link that might be useful: Coral Bell Forum

I've purchased a lot from Santa Rosa Gardens online in addition to many local nurseries

Last fall I bought some from Romence Gardens. They were large, well packed and survived the winter very well.

Here is a link that might be useful: Romence Gardens

If you are new to Heuchera and don't care about them being "designer" varieties I would suggest Home Depot or Lowe's. Already this season I found HUGE plants in 3 gallon pots for 15.00.

Lowes has some of the new varieties here. Santa Rosa Gardens is a great online source with great prices!