How Much Could This Custom Gaming Pc Go For?

1 x ASUS CROSSHAIR AM2 NVIDIA nForce 590 SLI MCP ATX AMD Motherboard
1 x Rosewill Xtreme Series RX850-D-B 850W Continuous @40°C ,80 PLUS Certified, ATX12V v2.2 & EPS12V v2.91, SLI Ready CrossFire Ready, Active PFC “Compatible with Core i7, i5″ Power Supply
1 x AMD Athlon 64 X2 6400+ Windsor 3.2GHz Socket AM2 125W Dual-Core Processor ADX6400CZBOX
1 x ARCTIC COOLING Freezer 7 Pro Rev.2 92mm Fluid Dynamic CPU Cooler
1 x Kingston HyperX 8GB (4 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model KHX6400D2K2/4G
1 x Seagate Barracuda 7200.10 ST3250310AS 250GB 7200 RPM SATA 3.0Gb/s 3.5″ Internal Hard Drive -Bare Drive
1 x SAMSUNG 20X DVD±R DVD Burner Black SATA Model SH-S203B – OEM
1 x Microsoft Windows Vista 64-Bit Home Premium for System Builders Single Pack DVD – OEM
1 x EVGA 896-P3-1257-AR GeForce GTX 260 Core 216 Superclocked Edition 896MB 448-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card
Not positive on the Case, i believe its a Thermaltake Armor series ( its huge and heavy (steel )
Everything works perfect – I would say the CPU is the only thing that really needs updating.
Looking to upgrade to a new PC and was wondering how much this would go for.