I'd ask to trade someone for a comparable loose specimen.
They only exist in limited numbers, and those numbers are decreasing every day.
For vintage and rare items, it's not just about us today. It's about the next generation of collectors.
At some point, we become stewards of the hobby, and our duty is to ensure the future of the items as best as possible, in the state in which we receive them (if not enhanced, eg missing accessories etc replaced).
Loose will always exist.
MISB won't, and it's numbers lessen each day.
If I couldn't keep it MISB, then I'd simply trade for one already loose. No harm to me, no harm to the other party, and I help ensure the legacy of the item continues, for the next generation of collector to be able to enjoy how they want, and not just be confined to loose examples.
Looking To Buy Either Siege Or Earthrise Ratchet, and Buzzworthy SS86 ER Cliffjumper.