I have the same nickname at both places and other than sending messages that never get answered how do I check to see if she's getting them?  I don't know if she's getting Renderosity messages or not... for all I know she never checks them but to me that would only further make her a bad merchant in my books (maybe she doesn't even speak english herself).
It's not actually that big a deal to me, I just won't be buying from serpentis again, that is all.