Only LLLL.net that have value above regfee in general are CVCV.net, VCVC.net, and quad premium LLLL.net. The best way to look at it is to take the value of the .net as 10% of the .com, so for a LLLL.net to have value above reg fee (7$) then the .com must be worth 70$ and at the moment only ones that are worth more then that are cvcv, vcvc, quad premium, some pronounceable and some repeating ones.