The listing is for a dedicated diagnostics laptop with an interface for old BMWs (made in late 1980s, 1990s, 2000s)

You will be able to diagnose ancient control units using ADS L-line (pin #15 on round BMW OBD connector), such as BMW M50 NON VANOS, M42, M60, M20 engine control units, instrument clusters, EWS units, etc, etc - all things you can't access using INPA D-CAN USB cable and INPA/Rheingold software. All this software is good for cars up to year ~2008

The offer consists of:

1) Used Lenovo Thinkpad T61/T500/T400 laptop with power supply and "native" (non-USB based) RS232 serial port. The laptop is well tested, all keys and ports do work fine. Mechanical 7200rpm hard drive with 100% S.M.A.R.T. health. Please note these laptops are ancient (~2007-2008) and will be too slow to comfortably handle modern websites and software. 

2) German made ADS/OBD (dual mode) RS-232 interface that actually works. The cable is ~ 1.8m long.

The laptop comes with Windows XP installed and BMW INPA / DIS (GT1) / TIS software pre-configured to work with this interface. It also includes some hard-to-come-by BMW 80s 90s era repair manuals and books for you to read. DIS and TIS are configured to have an English interface. INPA is a mixture of English and German as usual.