Sales are all over the place for L-L-L.com's
from $100 to $5000.
It looks like sales were higher a couple years ago though.
Why don't you put M-A-X.com up for $2000 and see what happens. If it sells, use the funds to renew W-I-N.com for 10 more years.
I like them both. If you don't need to sell then don't and just wait for an offer you can't say no to.
I like L-L-L.com! LLL.com would cost alot, so I think there will always be a market for the L-L-L.com
Obviously the hyphen lower the value from just a LLL, but everyone one here knows what the domains are and can remember them, even in a couple days you can recall what the domain was.
No one reads a L-L-L as Letter hyphen Letter hyphen Letter hyphen, if it is a 3L word like WIN or MAX.