I have a few 'doubles and triples' myself.
Some were given to me and mean a lot. I'll never get rid of them. But, I must go through some of the 'others' and thin out. Although the DAM9s) had their faults, they are a mighty good vacuum cleaner... the forerunner for most everything now. (Windtunnels) etc. The tools connect and suction are amazing. Those tools were just like the convertibles, etc... brushes, crevice tools, telescoping wands, etc were excellent quality.
Let's see who gets this cleaner. it shows that there ARE NIB out there.