it looks like they're charging $100 to install Graphene or Calyx on it. hell, i'd do it for half of that.
Discussion
Indeed. Is not rocket science if use web installer. Or even cli idlf can copy and paste.
Not a bad deal for 20 min of work!
I tried and got all mixed up with the specific version that I needed to install (it was a Samsung phone). So in certain cases 100$ seems reasonable.