I wonder if a 10 volume full TDNT would sell. Honestly consider this: It "retails" for $700. It's sold on CBD for $99. How much would you really end up paying for it in electronic form? How much (with license fees, time and effort) would it sell for?
My suspension is that most would end up rather having a $99 version on their bookshelf, than a $299+ version on their computer.
I don't know. I used to say that about the ABD, but I bought that from Accordance in the last few days. I do own the full TDNT, but I might be interested in an electronic version, if it were reasonably priced, for the same reason I bought the ABD.
And by the way, in general I prefer a physical book in my hand over an electronic book. However, with some books, especially reference books, it can be so beneficial to have it in electronic form, especially because of the ability to search the content of the text for keywords.
Case in point is back to the ABD. How many times have I wanted to look up a subject (in the hardbound volumes) only to discover there wasn't an entry for it. However, I knew that it was an important enough subject that it had to be covered somewhere in the six volumes. So then I have to try to put myself in the mind of the editor to think of how he arranged the subjects by title and determine where my topic is going to be covered. And then perhaps I find it. But what if it's also covered in another article? Unless it's listed in the "See also" I have no way of knowing this. That's where the beauty of the Accordance version of the ABD comes into play. I can search the content of the articles for any keyword I want. It's wonderful.
Plus, I would think that since Accordance already offers the NIDNTT and the Spicq Theological Lexicon, the TDNT would fit in well with those offerings.
By the way, I think I paid much more than $99 for my ten volume set. That stinks.