Found his website, and WOW!
https://edgewoodgardens.net/
In addition to snowdrops, he has a good list of trilliums for sale this year ($12 per rhizome or $80 per 10 rhizomes of the same variety -- might be a good group buy opportunity). I couldn't find pricing on his list of snowdrops... I think the numbers by the names are # bulbs available and not $, or at least that's how his trilliums are listed.
I want to go to the Galanthus Gala next spring!!