While I might buy something for the name, I do have to say that it won't stay in the garden if it doesn't perform, or if I think it is ugly, or just has colors I don't like.
Years ago (getting back to the SF and fantasy theme) I bought the daylily 'Lord of Rings'. (At that time, the AHS had restrictions on naming that we don't have today, so it could not properly be called 'Lord of the Rings'.) The daylily was by a master daylily hybridizer and won an H.M., but the flowers did not want to open well (what I consider well) in my garden, so it got the boot. (To be fair, it wasn't growing in the best of places... and I have issues with purple daylilies in general, anyway.)
On the other hand, sometimes a plant will have a name that is "close enough", as with the narcissus 'Loth Lorien' (as opposed to "Lothlorien", as Tolkien had it) and you end up loving it (even if the name isn't quite correct). Scheepers used to sell it, and I loved it, but I lost mine and they don't carry it anymore.
I would really like more of that daffodil.
(The cups of 'Loth Lorien' looked more lemon-y to me than in the ATP image... here is an old image I found, where the lemon cups had faded:
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