Hitachi CG24EKSL 23.9 cc Straight Shaft Trimmer with S-Start for $159.99 shipped.  Here is a screenshot for your reference. It features a 23.9 cc commercial grade engine, 60" Solid steel drive shaft, anti-vibration system, dual-line trimmer head with a 25-ft line and 17" cutting path.  Most places have this shaft trimmer for about $249.