Also I don't what you're looking at but there are plenty of great parts that are not that expensive. I mean you can get a kick but Intel CPU for $150 a good GPU for 250 and good motherboard for around than $100.
If your thinking of 'gaming PC' as the 'same cost' as a Console (most people think $250) this will never happen, nor will buying parts seperately now ever be cheaper then a 'premade' system now. Gaming PCs are notoriously much more expensive, and the parts stay that way till they be come to 'low performance' thus not many buyers and the price drops because of too much quantity.
Any Gaming PC is normally around $700 IF you don't have a copy of Windows (off the shelf NOT that came with your Dell/Gateway/etc), otherwise you can do it for around $500.
AMD GPUs are very overpriced at the moment because of Bitcoin miners. An AMD GPU can mine bitcoins at roughly 5x the speed of an equivalent NVIDIA card, thus sellers have raised the price of the Radeons up to $100 over the MSRP! As for Intel CPUs, they won't drop in price due to the way Intel manipulates their pricing of CPUs.
AMD's 6xxx and 7xxx series gpu's appear to be scheduled to drop in between 2nd and 3rd quarter of 2014. An R9 series price drop seems unlikely due to the mining craze. However, if there is going to be a price drop for the R9's as well it will probably follow with the same 2nd and 3rd quarter estimate.
As a postscript to this I would like to add that the 7870 is $200 and can hold its own against R9 280x's
Anyone got a 2014 reliable comparison with these, since there is so many new 'series' all from the same company it is getting real hard to say "Go with xxxx for med. performance, but xxxx for high performance". Thanks
AMD is actually lowering the prices on their mid-grade gpu's (between $100-$200) so if 1 of those isnt good enough for you then you will either end up paying an exponential price for a better card or crossfire 2 of the mid-grade ones. now for intel lowering their price, they will have to in the near future because amd is still stomping them in the bang-for-buck range. it will always be like that, or atleast for a long time, but as amd moves out of the cpu field and focuses on apus and gpus intel will likely raise their prices because they will be the only large manufacturer of x86 cpus. and for gigabyte mobos, thats kind of hard to predict, especially because it depends on how often intel makes new sockets and, also if amd goes under then all mobo manufactures will increase their prices a little bit, but that will not last for too long because gigabyte has to compete with asus, asrock and msi. so, imo i would save a little money and buy top-of-the-line mobo/cpu combo before amd moves out of the cpu field, and go ahead and do what you want as far as a gpu because mid-grade cards will always be more bang for your buck even when amd raises their prices as they invest more money into them and become superior to nvidia.