Check the listing for details. Planet Eclipse Etha 3 Paintball Gun Electronic Marker HDE Urban NEW. Color: HDE Urban, Condition: New. Listed at 549.95 USD. It took the outstanding Gamma Core drivetrain to a wider audience. Its quick-release bolt assembly makes a huge difference to accessibility and maintenance on, or off the field. The aluminum low-rise feedneck reduces the overall height of the marker for a tighter, more compact player profile.