I wondered about Accurracy International for years. I wondered about it so long I had to try it, and I became the proud owner of a green Arctic Warfare .308 in October of last year. It was (and is, for now) the most expensive firearm I've ever bought. Do I regret it? Hell no. Not for a second. If anything I wish I would have tried one earlier. This thing has totally changed the way I think about rifles. Now I'm going to sell off some of my other stuff to get another one in a larger calibre - price be damned. The satisfaction in owning one of these rifles is high. You certainly don't see alot of people selling them on the EE, to say the least.
The car analogy is a good one. You don't need a Range Rover (or whatever) to drive to work and back, but it'll get that job done too. Are there cheaper rifles that will shoot a reliable and consistent 1/2 MOA off the bench? Of course there are. There are legions of them, starting from relatively low-cost offerings from Savage and Remington and others. AI firearms are designed to extremely robust military standards, and designed to shoot with (or near) target rifle accuracy in any conditions: from -40 Alaska, to the sands of Iraq, to humid tropical jungles, etc., etc. None of us on this website will ever need that kind of reliability and durability, but we can still appreciate these firearms for the incredible works of engineering they are. The flat bottom action that is permanently bolted and epoxy bonded to a full-length aluminimum block - that made a ton of sense to me. It takes the "bedding" issue and throws it out the window. Are there awsome professionally bedded rifles that will out shoot an AI? Sure, but all the AI's are going to be "right there" with quality accurate rifles, and have the added bonus that you could bounce them off the ground from waist height without affecting zero or anything else. That's the difference right there: not ultimate accuracy, or shootablility, but superb accuracy and shootability in a package that is bordering on functional indestructibility.
Other rifles, like the SAKO TRG series, are very comparable to AI but at a lower price point for various reason. Some competitors for the military market (mostly from continental Europe) are even MORE expensive than AI! If you are looking for the best value for money, none of these rifles are going to even come close to maximizing that equation. But, going back to the car thing, you don't go to the high-end car dealership because you want the best value for money. Some people want these premium products just because they want the experience of owning and using them.
One weird thing that got me interested in AI as well... when the Bundeswehr went shoping for a sniper rifle, they bought one made in ENGLAND of all places. I thought... there MUST be something to these rifles! When in human history did that ever happen before

Military contracts aren't everything, but they do say... somebody tested it and found it to be the best option for them.
I really like the way the green AW's look too.

Here's my .308. I hope to have something else from AI by later this year: (with Steyr SSG 69)