I had one master reseller account in 2011.
Its totally depends on how the server owner want to do. I have seen may owner selling master reseller account for 2 or 4 usd month, can you expect satisfaction from it? Also many hosting owner have alpha reseller, super alpha reseller, mega super alpha reseller etc etc.
Always you have to choose good provider for master reseller.
You can choose VPS as well, then setup any free control panel for reseller hosting.