I'm looking for a new DSLR camera. Someone offered to sell me their Canon EOS 5D, which goes for about $500 for the body, or $3,000 if you find someone much too proud of their old equipment.
The 5D was introduced in 2005 and was advanced for its time. It was the smallest and lightest full-frame DSLR when introduced. The 13 megapixel sensor was well regarded. It was one of a hand full of professional DSLRs available.
In 2012 Nikon introduced the D3200, an entry level DSLR with a 24 megapixel APS-C sized sensor. This camera, which has already been replaced by the D3300, can be found for around $400 for the body.
According to DxOMark, the D3200 has more color depth and a higher dynamic range than the 5D, while the 5D edges out the D3200 at high ISO. The D3200 is faster and has a better auto-focus system than the 5D, and is also smaller and lighter. Resolution is resolution, and the D3200 has almost twice as much resolution as the 5D.
I could spend $100 more and get an old piece of technology that gives me a very small high ISO advantage, or I could spend $100 less and get brand new technology that is superior in almost every category. It would seem that the 5D is overpriced even at $500.
The point of mentioning all of this is to demonstrate just how far camera technology has come. A basic entry level DSLR today outperforms professional cameras of a decade ago. That is nothing short of amazing!