Technically you could enter it in the NTS layout contest, or in the convention contest, if you built one yourself. Not garunteeing that you will win anything. The show in 2014 had a few layouts similar to this (a brief case and a few instrument case layouts).
What happens if I accidently click Buy It Now?
Read ebay’s rules.
How about a guittar case? Here’s a TT scale layout built in a guittar case.
Bernd