Many domainers thought this was impossible, but then the NNN.MOBI's all disappeared and started selling for $100+. Now I just checked and the NNNN.MOBI's are going too. Premiums are pretty much gone, less than 5000 are available.
If you look at recent sales, .MOBI was very quiet until a month ago. Then the NNN's and LLL's were taken over night(see link below). I was told the same thing by 4 pro posters on here a while ago, every time you enter a new range of number sizes, the value is only about 10% of the small number.
For example:
1.com = $100 million
10.com = $10 million
100.com = $10 million
1000.com = $1 million
100000.com = $100K
100000.com = $10K
etc.
If that's the case for all number domains and NNN.MOBI's are going over $100, then NNNN.MOBI's are worth at least $10 or more right now.
http://namebio.com/?s=QN3ATMzQjM