OP: Interesting idea, but not sure how practical it is. The biggest problem for crafters is a severe lack of consumers.
The same way people go for +2/+3 now and undercut the NQ's people would be going for the 'Ancient' weapons and severely undercut anything they got that wasn't.
'Ancient' weapons just become the +3... but your idea to use 8 NQ's to even attempt would help some of the flooding~