Honestly, I haven't come across near enough sales data to have any type of justification towards asserting a valuation on these types of names. I don't think the data exists at present to make a rational conclusion here at present. Last I've seen, CCC.nets (without repeating numbers/letters) were fetching approximately reg fee - 2x reg fee on average. I haven't come across any sort of concensus on the valuation of CCC.nets with repeating numbers/letters.
IMHO, I don't think they're worth the expensive renewal nor do I believe there'll be an easy flip in the forseeable future for the large majority of them.
I got an offer for $500+ for a CCC.info / LNN on Sedo, but don't know if the buyer is genuine. I have accepted the offer, how long will I have to wait for some one from Sedo to contact me?