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Philip,
The price of the camera is based mostly on demand, and not on some subjective assessment of the lifetime of the electronic components from which they are made.
In any case almost all the components can be replaced or repaired and most of the major brands continue to offer full repair services.
What is someone willing to pay for it
The demand is based on lots of different things - AUD conversion rates, availability, rarity, competition, perception of value, warranty backup, customer service, reputation, features and benefits . . .
Some cameras become almost worthless because their technology has become superceded, but other cameras have never really been completely superceded to this day.
SBIG cameras have tended to hold reasonable value because they have some patented or maker specific options like internal guiding, provision for external guiders and adaptive optics capability which isnt offered by other manufacturers, even though the CCDs themselves are offered by many manufacturers.
So its a make by make, camera by camera argument really - how long is that proverbial piece of string ?
Check Astromart's sales history and you will get a reasonable idea of each particular cameras worth as determined by the USA 2nd hand amateur marketplace. That is possibly the best available benchmark, but it doesnt necessarily apply here - add 20% or some notional extra amount for Oz.
Bearing in mind that what the sale price is in the USA actually is almost irrelevant to the prices here !
Rally
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