I auctioned for mine on Ebay for a while. It took me a week to find but eventually I bought it. If you are really determined to get Daggerfall then be prepared to spend some time and money to get it
Let us pray that Bethesda will look into their hearts and put it on their site for free once the next TES comes around
Though be advised that Daggerfall is IMMENSELY buggy. I personally cant go 10 minutes without finding a bug in the game.
EDIT: Also a lot of very old but very epic games are hard to find and very expensive. Look at Final Fantasy VII. It was an okay game that was completely epic and now is being sold in the 100 dollar area on the PS1
Even back in the day playing an unpatched original version I only encountered a bug every two hours or so, and being a reasonable player I knew when to save the game at appropriate times so a crash to desktop wasn't much of a problem with the load times of next to nothing.
Now with a patched version through dosbox, I don't run into any bugs that I don't initiate.