Hmm let me try
LLN = 21x21x8=3528 possible domains that could ever be created with this pattern at least for Chinese market. This is RARE. If it is truly .Com.
NNL = 8x8x21 = 1344 even more rare!
NLN = same as above but no as valuable due to pattern.
If any of your domain numbers is 8? The calculations above drastically drops as you will need to change the equation above by replacing 8 with 1.
As 8 is thee most desirable number to the Chinese.
For western?
LLN set the desireable number is not 8 but 1.
But most western companies hardly ever have LLN domains.
Hard sell. But you can always use the equation above to do sales pitch. About rarity.
Good luck sounds like you have nice ones why not mention them here?