The 204 is an excellent caliber to reload and you can get everything as others have said. The cost of reloading is between $42-$55 per 100 rounds so half the price of buying factory loads. This depends on the bullet and powder you choose to use and how much you buy at a time.
The one thing I will say is in the two rifles I have hand loaded for REALLY prefer magnum primers. I have tried 6 different primers: CCI magnum, CCI standard, Wolf match, Federal standard, Federal match, and Winchester magnum in both rifles. The difference was huge the best was CCI magnums at about 1/2" groups on average and worst surprisingly was the Wolf match at about 1 1/2" groups on average. This was tested with 4 different powders and the differences were the same for all powders. So just a heads up to try some different primers.
There are many different bullets available and they all work but the berger 30grs stand out to me as a great bullet if you wanna run fast in the 4200-4400 fps region.
If your a long range type shooter the sierra 39 grs berger 40 grs are both great proformers with Vihtavuori N530 running just over 4000 fps.
Just out of curiosity what rifle are you thinking of getting?