Sorry Mike I don't agree, the dc 15 is also no longer available new,
I have both the dc25 ,24 and 15 and the 25 is by far the more superior machine in terms of cleaning ability and build quality.
The dc15 is a nice machine but it was also the first attempt , the suction power on hard floors is not very good and even on carpets it is outcleaned by the dc25.
The dc15 was never sold in SA but allot of people brought them here when immigrating. we regularly have them in our shop for repair. the dc25 is one of the best selling Dyson's in SA and we hardly ever see them except for when someone has sucked up something they shouldn't have.
The dc25 also feels far more sturdy when you are using it compared to the 15.
I can't wait for the dc41 as my only gripe with the dc25 is that the container is to small