I could pay probably up to $5-6 for it. Tho, can you sell someone else's app? I know a lot of work have been put down to make it work outside of China and that's why I'd pay for it.
But I think it would feel more right to make a "server donation", I mean that's where the money will go anyways.
Well to be more exact I thought the libaudioflinger.so was the problem since you need a modded version of this file to use DSPManager. Even if you uninstall DSPManager you still have the modded .so-file.
But since you haven't even used DSPManager I guess that's not the problem then.