Personally I'd consider your PRS CU22, EB MM Y2D and Suhr way above the average and into the high end of production line guitars. You don't get better (and that's subjective) without paying a whole load more dosh for custom work. The Vela judging by the prices I see here would be at least upper mid range as well (£1200 approx).
A more average guitar IMHO is something like a Mexican Fender Strat (seeing them for about £450 at Andertons in the UK).
The MIM Strats and Epis may be
low average, with the price point of American Special to American Standard lines being the average (or a bit above)...all coming in well below John's other guitars. This might be particularly true if we look at the average being based on the average "working" musician, compared to the hobbyist (which includes folks that go cheap and guitar loving lawyers and such...not that there aren't some great players in that group of people that can afford super high-end guitars despite not using as tools to pursue music as a profession).
But it doesn't really matter. It's almost always a combination of what inspires you and your means (as well as how you prioritize and manage said means). For some folks that will only be custom shop or small and boutique builders. For others it'll be a Squire Affinity. As to the OP, $4,500 is definitely not outrageous for a quality acoustic or hollowbody (especially a solid wood hollowbody). It is, however, becoming a more common price point for some production Gibsons and "standard" Fender Custom Shop instruments. And despite some instruments being easier to make than others, costs increase (often rather steeply) when you start paying for more selective and/or rare materials, more highly skilled builders/artisans (and the attention to detail that they bring), and fit and finishing. Then if you want a real custom shop piece or have someone like Doug build a Starliner, Dayliner, Banshee, or Arcturus to your specs and fit and finished specifically for you, $4,500 doesn't seem out of line.
I have a hard time going over $2K since I have or have owned some amazing instruments that never went above the $1,800.00 mark. That mark being set by the 89/90 PRS Custom "10" top with birds that I got new for HS graduation. The most I've paid since then was $1,299.00 for my Takamine Gecko LTD and my PRS CE-22 maple top. Most of the other stuff was around $500-600 bucks for MIA and MIJ stuff with some stuff going well below that and other things going a few hundred above. Were I making a living playing music, then I might be more or less willing to spend more (depending upon how "successful" I was). Other folks are willing to spend more, even for their hobby and there's nothing wrong with that.
Just buy what you like for the price you're willing to pay.