My Dell Vostro 1500 running Windows XP SP3. I found this as an office was clearing out their office supplies. I plan to install SP4 on it at a later date :
Dell Vostro 1500 15.4-inch (2011) - Core 2 Duo T5470 - 1 GB - SSD 120 GB | Back Market
Checking out Dell's Vostro 1500 Business Laptop | Windows Experience Blog