I doubt it after all of this time. But I think the plan was to keep her for a bit. I really believe he was acting out his fantasy of being The Collector from the movie. It's the mask he ordered, it's the one he wears in the pics ( he must own more than one of that particular mask), posing by the cellar.
the movie plot
from wiki
""Clegg decides to add her to his
'collection' of pretty, petrified objects, in hopes that if he keeps her captive long enough, she will grow to love him. After careful preparations, he
kidnaps Miranda by
drugging her with
chloroform and
locks her up in the cellar of his house."
IMO The FACT he ordered & that MASK before she disappeared and the FACT he was
THRILLED with it so much he had to leave detailed feedback about it on Jan7th. I can't help but think he maybe following that Movie PLOT....and following that plot....she was locked away somewhere.