Similar to timepiece, cameras are collectible items. Good classic cameras prices will increase overtime, such as limited edition Leica and Rolleiflex. Digital cameras definitely not in this category, for now.
While Leica and Rolleiflex is the high end stuff, not every collector need to spend ten of thousands on their collections. Here's a guy name John Kratz who has over 150 cameras in his collection and half of them are toy cameras, from beer can to Voltron. These toy cameras turn out to be even more rare than Leica in the long run, as people easily ignore and treat them as rubbish. For a full collection you can visit his flickr gallery.


This financial crisis definitely hit a lot of previously rich people in the western hemisphere and since early this year, I have seen many people selling/auctioning off their once pricey if not priceless film camera collection. For example, the rare and already discontinued Hasselblad XPAN II. Before financial crisis, there's less than two units found on eBay. Now, there are over ten of units available for sale at any given time.
If you are extremely loaded with cash, and not hit by the current global financial crisis, and crazy about Leica, here's a good chance for you to setup a Leica museum. A Netherlands owner is letting go his M6 collection. Fourteen of them! See them for yourself (while still available). The total cost, a cool USD75,000.


To date there's no Guinness world record for the title "World's Largest Camera Collection*", but I think Mr Sekar from Chennai come close.
Chennai man owns 3,000 cameras

PS: You will need a magnifying glass.
Lastly, just to share with you, my dream camera collection. So far only collected five. Still a long way to go.
Note: There is however a Guinness world record for "World's largest movie camera collection".