Not a big spender here, but I'd take 5 of any trillium. Or 10 (either the same kind of 5 each of 2 varieties). Wildflowers have the reputation of being hard to establish, not sure if that's more true for some than others... I've particularly heard that Jack in the Pulpit is very picky. Are either of those Lobelias hardy here?
I've got variegated Solomon Seal from Bluespiral in the front yard. Dug out a bunch of roots last fall that may or may not still be in a pot in the garage (should be dormant but viable if so)... I'm hesitant to offer anything I haven't already dug.
Do Virginia Bluebells and Wild Ginger perfer damp, or can they handle summer dry spells?