Price is 800 C-Points and it is a T3 ship. There is no T5 you can use the skin on, you can use the Point Defense Anti Fighter console on other escorts though.
VA retrofit ships will become C-Store only with FTP and will likely cost 1600 C-Points then.
So if you have yet a free VA ship to claim, do it soon or if you want an account wide unlock spent the 1200 points now.
I would buy the thunderchild if there were a T5 Akira or if you could use the skin on the fleet escort.