i heard it was like 800?

 

Most of the stations in /warp market have them, especially /warp station10. Usually around 690-725 per star.

 

warps -- station10, rochester, and wildfire sell them for 695
warp bet sells them for 685 which is the cheapest so far but it's rarely stocked, still worth checking out from time to time tho
and lastly warp store sells them for 725