It's called a free market. Places charge what they can get, what the market can bear. Places that charge too much will lose business and those that charge too little will get more. They will then adjust and business volumes will adjust. This assumes that they all do an effective job.
Nobody is getting ripped off here. If a buyer and seller of a product or service agree on a price and both have delivered on what they said they are going to do, then it's a fair deal. If it wasn't they both wouldn't agree to it. If the OP couldn't find anyone to fix his amp for what he considered a reasonable price, he wouldn't do it.
Nobody is getting ripped off here. If a buyer and seller of a product or service agree on a price and both have delivered on what they said they are going to do, then it's a fair deal. If it wasn't they both wouldn't agree to it. If the OP couldn't find anyone to fix his amp for what he considered a reasonable price, he wouldn't do it.