Eclipse head units that have the esn feature are automatically locked when their power source is disconnected. If the seller can't provide you with the cd that was used for security, I believe the unit is useless.

Vinny 2000 T-RED CSVT MODS: 18" REV model 2 ST200 struts/Roush springs CTA intake Pipe/K&N Filter Dtec Heatshield Optimized TB True Duals w/ magnaflow mufflers/resonators