Surely a fourteen year old camera is a useless fossil, right?
Not so fast...
At launch, the MSRP for the camera was $2,699 without a lens. Nowadays you can pick up a nice used body for $350 or less, which is about as inexpensive as a good full-frame DSLR gets. A lot of these cameras were picked up by enthusiastic amateurs based on the hype and then sat largely unused until their owners decided to trade them in on some new mirrorless hotness or other. Batteries are still available new and of course you can use the entire library of Canon EF lenses without having to worry about an adaptor.
One of the attractions of using the Canon EF lens mount are its "L"-series lenses, identified by their red rings, high quality construction, premium optics, and (typically) enormous price tags.
The latest version of the L-series midrange zoom, the 24-70mm f/2.8L II, goes for something like eighteen hundred bucks at BezosMart, but you can get the older version from the 1990s, the 28-70mm f/2.8L, for around six bills at KEH Camera Brokers if you're willing to settle for "Bargain" grade. (And you should be, because KEH grades very conservatively. Their 'BGN' would be 'VG+' most places.)
Introduced in 1993, the 28-70mm f/2.8L was noted for its optical qualities and indeed still holds its own at DxOMark. I use mine on my 50MP EOS 5DS without worrying about it not being sharp enough on the super high res sensor.
So there you go. If you're willing to shop used, you can get a very competent professional DSLR body and lens setup for eighty percent off.