"Computers aren't the same as cameras. Comparing them is like apples and oranges."
1. I have to disagree with that statement. Essentially a digital camera IS a computer.
2. So why wouldn't it be logical to expect a camera's abilities to increase substantially every couple years? Note, I didn't say double every two years, but a substantial increase.
3. But knowing a DSLR is essentially a computer why do we have such outrageous prices for used models?
1. A digital camera *has* a computer inside, but it is not
a multi-function device, like a 'desktop computer.' It's more comparable to a 'gaming' system (PS, XBox, etc.): a single-function device, which use proprietary hardware and, like cameras, get updated much less frequently.
2. Because computers are general function devices that use standardized
hardware and there is a lot of competition. Another reason is that the system vendors (HP, Dell, IBM, etc.) don't have to design and build their own processors: Intel and AMD take care of that, and their head-to-head competition drives design and keeps prices down. Canon and Nikon know that you're not going to take your lenses and mount them on some start-up company's camera, so they don't have to release new cameras as often. Since they're both making lots of money, they have no reason to change. [If all lenses fit on all cameras without
an adapter, and all of a sudden a new company came along and started rolling out new cameras on a faster schedule with new features, Canon and Nikon would be forced to change.]
3. Supply and demand. People can sell products (new or used) for whatever the market will bear. If no one was willing to spend that much money for a used camera or lens, the prices would be lower. It also shows the lack of homework that people do, especially when you see someone buy used equipment on places like ebay for close to or even more
than a new item.