Thank for your appraising.
But, "do" means a lot.
To type 2"-" would not cost too much time than 1"-". And "-" is near "o".
The facts is that some L--L sold for $xxxx, some people can't afford or just don't want to pay too much for LLL.com may want this kinds of domain.
Why are you asking for appraisals if you already have your mind made up?
Namebio has one reported sale
i--a.com $1,000 2011-07-02 sedo.com
Does not mean any comparable domain will ever sell, or that this sale is the benchmark...
Frankly, I think this one would be tough to sell. Domains with hyphens can sell, but double hyphens kills any prospect of a sale. I'm not hopeful about this one.
An L-L.com could sell for low $$$$ though.
*the exceptional businesses of our esteemed moderators