Man, this is an old post and it is not relevant right now, but I guess there are discontinued coins and it might be relevant to other people.
So, let's hear the name of the coins that are discontinued but you can still find a buyer for them.
I think this list will be very long.
Many coins out there were forsaken by their devs or just declared "finished".
After all some altcoin devs just jump from coin to coin for money.