Not worth much yet, but now that the LLLL are sold out, I think in about a year the LLLL will really start to dig in with value. There are still many, many LLLLL left that sound and look good, but they are disappearing fast. They're in 'kindergarten', so to speak, and I and other members post lists of available ones (see my sig, new list added today) and we're carefully regging the best ones we can find.
Best to get ones that have quite a few things going for them, like: they sound exactly like they look, and are difficult to spell in any other way; they remind you of another popular word, or they sound like a real word even though they aren't; they strongly bring to mind a feeling of how a person would use them; they are a typo of a popular word; they have reasonably high Google pages so you know people know the word; they ARE a real word; they're a somewhat known first or surname. Etc etc. There are a lot of criteria.
The main thing to remember is there are a LOT of them still left, so reg them extremely carefully rather than going hog-wild.
A very, very unique LLLLL can generate some interest even if people don't know the word. Without intending to hijack your thread, my Brudu.com in sig was regged recently and has gotten the most interest of my LLLLL.com's; it's very unique and brandable and brings a lot of google results. Another good example is one I don't own yet, it is still available and hasn't been posted on my public lists: glirg.com -- great LLLLL, but I've been holding off because it's very good but not stupendous, it doesn't sound like any other word, there are a couple alternate spellings that sound the same like glurg and glerg, and also I just couldn't imagine a strong, clear use for it and I think it would be hard to find an end user for. Great word, but far too general... and that statement is the prob right now with so many LLLLL being regged.
In other words, don't just reg a name because you like the sound/look of it (unless it is for your personal use and you want to develop it), reg a name for DEFENSIBLE reasons... that is, you can defend, explain, rationally reason out why you think it might sell, and to whom specifically, and for how much.
It's a little early to be thinking of getting good $$ for LLLLL's, but it's also the exact right time to be smartly and carefully investing in a few of them, and consider holding on to your best ones for at least 1 - 3 years before thinking they'll have profit value.