Michelin Pilot Tarmac Tires - 16/15-14 N20

These tires I bought with the thought that I would run a few tarmac rallies.
That never happened.
So I have 5 Michelin Pilot Tarmac Tires - 16/15-14 N20 to get rid of.
3 of them are brand new and 2 of them have been heat cycled a couple times.
Here is a link to the place I got them. http://www.subesports.com/products/cat/Tires/brand/Michelin+Rally/prodID/801

They are worth $185 a piece new. I have 3 new ones. 2 heat cycled ones.
All I want is $300 for all
I would think you could use them for autocross, drag racing, or any other way you choose.

http://i22.photobucket.com/albums/b327/tinyrally_1971/Tinyrally/CRX/DSCF3363.jpg
http://i22.photobucket.com/albums/b327/tinyrally_1971/Tinyrally/CRX/DSCF3361.jpg
http://i22.photobucket.com/albums/b327/tinyrally_1971/Tinyrally/CRX/DSCF3364.jpg
http://i22.photobucket.com/albums/b327/tinyrally_1971/Tinyrally/CRX/DSCF3362.jpg

What is the advantage of running those vs. a more “conventional” treaded DOT-R tire?