2-L.net could be a site for LL-domains... a pity itself is C-L. The same rule doesn't work with 8-C.net since noones interestes in 8 character domains.
Both seem to have a little bit of traffic afaics.
Couldn't find any comparable sales. L-L.net went for around $2xx to $4xx.. no data for C-L.nets.
I'd say up to mid $xx for 2-L.net.
Regfee for 8-C.net.
Good luck