From the pictures it is likely he might be into the system $7,500, and $5,000 is probably fair if you planned to use all of the components.
A "good deal" is going to depend on what you want, and what you are upgrading from. If you were to plan out your dream system, and it looked very much like this, then I'd say it's a great deal. If the idea of designing your own system and finding/assembling the parts intimidates you, then that would make this a good deal too.
If there are things that you'd change, or want to upgrade later, then the deal gets worse. Especially if you're going to want to make a significant change (like going all electric or HERMS).
[Opinion Time]
That Stout boil kettle on a Blichmann burner is a thing of beauty!
The fact that the rest of the hot-side system is piecemeal is a big turn-off to me. For my $5,000 I'd want matching kettles and actual PID control at each heat source (gas valves or electric). How is he adjusting the burners?
Plumbing is a bit odd, but I'm sure he had reasoning for all of it. I think it looks inefficient, and the bottom pump mounts don't match "best practices"
The conical is pretty, but for me I'd rather spend that money on a fermentation fridge and just stick with carboys.
The kegerator is nice, but it can be built from a used fridge and parts pretty easily.
