StarTech.com 4 Port USB to Serial Hub

This USB to RS-232 serial hub lets you connect RS-232 serial devices to your laptop or desktop computer through a single USB port, as though the computer offered built-on DB9M serial connectors. The RS-232 serial hub is compactly designed to preserve valuable workspace, and is bus-powered to eliminate the need for an external power adapter.

Price: 95.14 from EE Store