I wouldn't want to buy a hatchling that was eating ASF only personally. Getting ASF for me would require driving an hour and buying them live whereas the food for everyone I have now I buy frozen every couple months at either the expo an hour away or the other one that's half an hour away.
While I could switch the hatchling over on my own, I wouldn't really want to do it until I was sure it was eating properly in its new home which would mean feeding its normal diet for a while. So that would mean weekly two-hour round trips, assuming the guy has the right size of ASF in stock, and killing small rodents myself. Not at all tempting if I have other options.
Now if you were also offering a convenient source of frozen ASF? That's a different question. That would be a much easier sell for me personally, but I don't know whether it would be a good business proposition overall or not.