here is a list

http://www.hostagrowers.org/Retail_Members.html

ones that i like are

in the country, green hill, new hampshire and hornbakers

uniquely changed owners but may still be good, i don't know

plant delights is good but pricey

Favs of mine are Hornbakers, Land of the Giants, Hosta Store…. I have ordered from New Hampshire hostas, an Maple River Gardens and others that I can’t recall.

debra

Thanks for both of your recommendations!

Land of the giants was a great place, loved visiting there. Owner passed away so no online orders yet.

I've been happy with Sebright, Hornbaker, and Plant Delights.

I really like Hornbakers for the size, Hostas-store and Uniquely Hostas for the selection, Green Hills and In The Country for the latest and greatest. Green Mountain had good prices and decent size but I haven't ordered anything from them lately. Just stay away from the giant mail order companies and you should be fine.

Northern Grown Perennials out of Wisconsin is very good.

There used to be a guy on eBay that I have purchased over 100 hostas from- all have been true to variety, good sized, and never once have I gotten any HVX.

He has a storefront as well that I now use so he avoids eBay fees- it's here.

I highly recommend him.

So many helpful recommendations - thank you!