It's not armor but I think that there may be interest here.
I have a 1710 flintlock naval brass barreled blunderbuss. Say that 10 times fast...
The stock is in good condition, the lock is fully functional, and overall if you've got the kahunas it's fire able.( I wouldn't recommend firing a 300 year old hand cannon.)
I hate to sell her.. but I'm replacing my gun collecting hobby with my SCA one.
It's been valued at $3000
I'm looking for $1500 to recoup what I've got in it.