Ok, let's expand the question a bit then.
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If you had X amount of money to invest, which of the following would you buy the most of until your budget ran out?
(Put in order of purchase priority.)
LLLL.com (all premium letters)
LLLL.com (3 premium letters)
LLLL.com (2 or less premium letters)
LLLL.net (all premium letters)
LLLL.net (3 premium letters)
LLLL.net (2 or less premium letters)
LLL.com (assuming your budget was big enough)
L-L-L.com (ending in L, A, C, O)
LLLL.com (ending in L, A, C, O)
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Remember we are not talking the current values of these domains, but how well we think they will increase in value.
On gut feeling alone, I would go with
LLLL.com (2 or less premium letters)
LLLL.com (3 premium letters)
LLLL.net (all premium letters)
LLLL.com (all premium letters)
LLLL.net (3 premium letters)
LLLL.net (2 or less premium letters)
The rest I am too unfamiliar with to speculate on. Turns out there is a strange symmetry to my list above if you look for it.
But frankly while making this list it seems to me that it's all good! Good time for flippers I guess what with a lot of free-range domain types currently dying off.
:tu: