At least 5. A computer/laptop is usually a multi thousand dollar investment, which may take several months to save up for. It better last! Idealy it would be nice if they'd last even longer but usually they are obsolete and not actually broke. Though I do find today's hardware is sub par quality and tends to have high fail rate. It's rare that I build a computer without spending months trying to troubleshoot some stupid issue and replacing one piece at a time and end up spending another thousand or two.
Thousands? This is 2013, not 1993. The laptop I mentioned above was about $550 when I paid almost 3 years ago. You can get a decent laptop/desktop for less than $500 when they are on sale.
Here is one from Dell, about $416 after 20% off coupon:
System ID ZB2KYAR7
Inspiron 15 - 3521
Dell Outlet New - PC
System Price: $479.00
Processor Processor: Intel Core 3rd Generation i3-3227U Processor (3M Cache, 1.9 GHz)
Operating System Windows 8
Base Dell Outlet Inspiron 15 - 3521 Laptop
Hard Disk Drive 500 GB SATA Hard Drive (5400 RPM)
Memory 6GB DDR3 SDRAM at 1600MHz
Media Bay 8X DVD +/- RW Drive
System Color Black Matte with textured finish
Laptop Screen 15.6 HD (720p) WLED with Truelife (1366x768)
Laptop Battery 4 Cell Battery
Network Interface Card Dell Wireless 1703 802.11b/g/n, Bluetooth v4.0
Web Camera 1.0 MP HD Camera with MIC
Keyboard Dell Chiclet Keyboard with Multi-touch Touchpad
Hardware Upgrade 125V Power Cord
65W AC Adapter
Software Upgrade Windows 64 Bit
Office Software Microsoft Office 2010 Trial Version
Security Software McAfee Security Center, 30 Day