Trade-in
  • We do Trade-in as well as buy your used
    computers, Laptops and monitors even if you
    don't buy ours and it doesn't have to be working.
  • Currently we can only accept Pentium 4 or higher
    PC; if you do not know what you currently own,
    please feel free to bring your computer in,we will
    make you a offer if it meets our minimum
    requirement.
  • We do not buy printers, scanners and fax
    machines.
SIGMA COMPUTER
No Kidding, Just Deals since 1997
Tel: 773-581-9083