This is a GREAT idea!(use a paper towel tube on each mid and tweeter)
I think the question is one of market value rather than whether you value the sound that much, with all due respect.
Listen to them first and make sure all drivers are working (use a paper towel tube on each mid and tweeter), and that you like what they sound like. They may need a recap. In fact several drivers were not working on the pair I got, and it was all in the crossover, not the drivers.