don't worry i have more growing out as we speak!
I know you said your LFS wanted them and are first in line (they are buying 200??!?)
That's what I'm wondering about. Why wait for them to 'grow out'?
When selling on here, I don't think anyone here cares whether they are the size of a pea or the size of a walnut. In fact I'd rather buy them as small as possible. The change in water conditions often creates lines in their shell and it's much more apparent in bigger snails than in babies. I don't think anyone here wants adults (but I guess I shouldn't speak for everyone