Dell PowerEdge R910 Server $7000
4 X Intel Xeon OCTA Core 2.0Ghz
4 Physical 8 Cores Processors intel X7550
Each Processor with 8 Cores and 16 Threads 
Total 32 Physical Cores , 64 Threads , 64 Logical Cores 
18Mb L3 Smart Cache
6.4Gt QPI Link
Processor Specs :https://ark.intel.com/products/46498/
vmWare ESXi 6.0 Compatible
Citrix XenServer Compatible
Windows Server 2012 R2 Compatible
Support Linux , Ubuntu and many other OS
Support Virtualization Technology
VT-x , Hyper V , VT , VTX Compatible
Support vmWare , vSphere , Hypervisor
Support Nested VMs
Support SLAT , EPT Extended Page Tables
Support 32Bit and 64 Bit Operating System​
1Tb RAM
64 X 16Gb DDR3 Dimms 
2 X 240GB SSD Drives 
2 Physical Hard Drives
other Hard Drive options are available
Hard Drive upgrade is also available
8 X Hot Swap 2.5" Hard Drive Bays
Dell H700 Raid Controller 6 Gbps with BBWC
Support upto 32Tb Internal Storage 8 X 4Tb
Support SAS , SATA and SSD Drives
4 X Gigabit Network 10/100/1000
iDRAC Enterprise Remote Management Controller
2 X Redundant Dual Power Supplies
Railings not included 
Face Plate is included
4U Size Rackmount Server
More Specs : http://www.dell.com/downloads/global/products/pedge/spc_r910_new.pdf
Windows Server 2012 R2 Trial Version is installed
we can also install vmWare ESXi 6.0 Trial Version
You can test this server before buying
Fully tested and Functional  off-Leased unit 
1 Year Hardware Replacement  Warranty
=====================
You can Chose one of this HDD option:
2 X 240Gb SSD
OR
3 X 300Gb 10K SAS
OR
3 X 500Gb 7.2K SATA
=====================
Trays Comes with Hard Drives only 
=====================