when you edit auction click on advance options next to listing type.....click Allow users to instantly win my listing.....enter number..update ...hope that helps....thanks
go to auction on the top should have a tool looks like a pencil click on that to edit ur auction scroll down to very bottom to advance options click put in number...click save at top....note it will be a fee of 50 credits and you can put in 6666 that way you will get the full 6000....hope this helps.... :)