Limited value in these domains IMO. Hyphened names are usually worth less and one hyphen in such a short domain (3 letters) does not look really great. I would rather go for a true LLL domain. For branding it is also better without hyphen (so you do not have to pronounce it in a commercial for instance). But I understand some companies only use 2 letters as acronym so it may be the best option to them. IMO value would be in the low $$ range.
Since it is not possible to register two letter .us domains was my thought that US companies with two letter initials might be interested in the hyphened version instead. For example did I notice that Harley Davidson owns h-d.us
For a small company seems a hyphened two letter .us to be a much more realistic purchase in terms of price compared to a two letter .com and the specific two letter .com would of cause only be an option if it actually is for sale and not used by another company.
What is your opinion about l-l.us domains for long term investments?
l-l (dot) anything is rare.
I see mid xx now, possibly low xxx when .us becomes more prominent.
Like I asked earlier, the letters are important.
harley davidson probably paid big $$$ for H-D.us
I dont think they would have coughed up that much coin for M-C.us (motorcycle)
I like "O-O.us" it looks like a motorcycle, sort of.