How expensive are satellite fuels?

Search on the actual substance names . Hydrazine , liquid oxygen , helium etc .

Generally though the actual cost of chemical fuels , coolants and pressurising agents is trivial compared to the other costs involved in any space mission .

 

The cost is dominated by the lift cost of $5-10,000 per kilogram.

 

Not going to be a lot of information out there, especially for some fuels. Why not email the public relations division of a commercial satellite manufacturer like Space Systems/Loral. They might be able to share a ball park figure with you.

 

Google cost per kilogram to LEO. 325,000 results.

 

Once a satellite is in orbit, it can in some cases be reconfigured when needed by short burns of micro thrusters.
Typically these use Hydrazine, which gives a lot of bang for the buck and is fairly light weight.
Hydrazine of itself-is not really expensive, a quick googled revealed industrial suppliers at around $2000 for a metric tonne.
Liquid hydrogen could be used, but that has problems with containment.