That's not a bad price on the counter gear, I think I paid $75 for each if mine. But, that was a hard pull to swallow price wise. I had just eaten a second gear box and already had the axles and outer drive cups.
Keep in mind that my fox is brushless and I know how I drive it. I'm not careless or a basher, but I do run it hard, fast and through the air. Lol, so I made up my mind to keep the speed, but that meant paying the price to do so.
If you're gonna stay with a brushed set up, you can make the stock gears work and last. Proper grease and shimming goes a long way. Also pay attention to the rear suspension set up as I learned you can stress the diff with too much length in the rear shocks.
Good luck and I hope you continue to run as enjoy your Fox.