Okay, so I lied. These TARDIS computer cases obviously can’t store a gazillion terabytes of data (how big is a gazillion anyway?) But if it really were the Doctor’s, then I bet it could store as much data as he’d want to cram into it.
This TARDIS Computer Case is an officially-licensed product by retailer Scan. You can configure the systems based on your preferences, but the base starts at £936 (around $1,511) for an Intel Pentium 3.1GHz Dual Core processor with 8GB of RAM and a 500GB hard drive.
You could get more bang from your buck somewhere else, but it won’t look as good as this case right here. Check out it’s product page for more information and more options.