You can buy programmable digital hearing aids for under $400.00 US on eBay. The problem is one needs a professional to calibrate them and for the counseling portion.
It is not hearing aids that you need to treat tinnitus and hyperacusis unless you have hearing loss. All that is required is white noise generators. There are two types: Analogue and Digital. It is only the digital WNGs that need to be set up by an Audiologist on a computer. Analogue type do not.
Michael