It will be hard to find a good axis right now, as most have shed their antlers. Best hunting for them in summer.
I have not been to Diamond C yet, but am going there in a few weeks. I hear good things.
Bar E, Double L, Double Arrow, all have good heards of Blackbucks and I have hunted them in the last couple of years.
I don't know what you have in mind for a price, but the market for a trophy blackbuck is 1000 to 1500 hundred in my opinion, depending on size and ranch. Anything less than that and you have a real bargin, if it is over that, he better be a monster.
I am attaching a pic of my youngest daughter with her BB from this year at Double Arrow.
The other two pics are from Double L in Aug this year.