Unfortunately, its not worth much. Thats a six year old motherboard; Epox went out of business 3 years ago . AGP graphics cards are not made anymore. Celeron D is a 2 generations old single core and is nowhere near as fast as the dual and quad cores from the past 3 years. The graphics card is 4 generations old and not even as good as the current intel onboard graphics. In all seriousness, "very fast" and "great for games" are not phrases applicable to that computer since maybe 2006.
Are your HDDs, DVD and CD IDE or SATA? If they are SATA they may be the most valuable parts you have and could net you some money. If they are IDE then they are worthless.
That reminds me of my uncle. He would always bring me these old computers with P3's and semprons with 128mb of memory to fix and expected them to be as fast as my stuff. Finally I convinced him to let me build him something, it was still a generation old at the time but he couldnt believe how much faster it was. He also upgraded from a 13" CRT to a 19"LCD yeah 13". Oh I took what I wanted out of the old ones and junked everything else.
Here is a complaint for you, rhydiansmith, since you're looking for one. You moan and groan about us not being any help. I summarize all the comments, because although not stated politely, you have a point. You don't even offer any thanks, but then take your thread in a new direction.
Your build has the following attributes:
1) You did not take the time to provide us with basic information like primary use of the PC, budget, preferred vendors etc. There is a sticky at the top of this forum which identifies all that is needed, but you are probalby not even aware becasue you most likely have not taken the time to read much of anything here.
2) You did not do the most basic research - that motherboard will not run a Phenom II CPU, let alone a hex core. The memory will not work with the CPU or the motherboard. 6 GB is also inappropriate for Dual Channel memory. The build is incomplete and two thirds of the parts are unidentifiable.
3) There are threads in here that are hundreds of posts long and answer dozens of questions for those that are interested in learning, and motivated to do so. Yours is not one of them.