James and I were typing at the same time.
Material costs can vary widely, even within a given species, for a lot of different reasons. For example, different suppliers use various designations in their top grading; AAA might be the top of the line for one, and a middle grade for another. Also, top grading is almost all based on appearance, not on suitability for use as a guitar top. I've gotten expensive tops that were nearly useless, even though they looked good, and cheap ones that made fabulous instruments despite some cosmetic flaws. The sort of thing holds all the way down the line. 'Rosewood' encompasses a large number of species from Brazilian rosewood through African Blackwood to Indian. Brazilian rosewood is an endangered species, and it can be difficult and expensive to get really top grade Brazilian. Indian rosewood can be plantation grown, and is pretty well regulated by the Indian government, so that it is available in decent quality at reasonable prices. Tuner prices can vary by a factor of ten. Polish (what we in the US call 'finish') is not all that expensive as a material, but can be time consuming to apply. Overall, it's possible to obtain a decent set of material and parts to make a guitar for around $150, or you could spend well over a thousand.
Some makers are faster workers than others, but most hand makers will spend at least 100 hours building a guitar, and 200 would be closer to the mark for many. This is particularly true if you're looking at a French polish finish, along with personal touches such as a hand made rosette. Even at minimum wages that's a fair piece of change.
Most of the cost of a high end guitar is not in the materials or even labor; it's in the expertise of the maker. Think about it: you could probably hire some Joe off the street to sit on a stage with a guitar for an hour or two for a pretty nominal amount of money, so why seek out a great player who might want a minimum of $1000? Buying a guitar is the same. Top makers command the prices they do because there's a consensus that they're worth it.
It's actually fairly difficult to make a really good Classical guitar; far more so than a good steel string. Many top steel string guitar players use production instruments, because it's possible to make good ones on a production line. Very few, if any, top Classical players use production guitars, and this despite the risks of traveling with an expensive and fragile instrument. In terms of the joinery involved, guitars are actually not too hard to make, although they do require attention to detail and a level of precision. Making one that provides the tone and playability that a top-notch player needs goes several steps beyond mere joinery, and requires a high level of understanding that takes time and diligent application to develop.
In the end, building guitars is not a ticket to wealth.