If youre just referring to letters with no numbers - theres 17,500 approx possible combos - which makes them a "rarer" commodity. People tend to pay a little more when something is "rarer"
As posted above if its marketed correctly, then it could be in the low xxx's up to over a mill. for a good 3 letter actual word
throwing numbers into the mix of course makes it a little messier - depends on what types of acronyms you can come up with
