Amazon has Sperry Instruments GFI6302 GFCI Outlet/Receptacle Tester for $5.94 with free shipping for prime member or on orders over $25. You can save $8.05 at checkout.
- Hi-Impact Resistant ABS housing with soft over-molded rubber grips with a compact ergonomic design
- Bright color-coded neon lights for easy visual indication
- Standard 3-Wire and GFCI protected 120Volt AC Outlets. Frequency (Hertz) 60Hz
- Tests GFI Outlets and standard outlets that are wired in series with GFCI outlets (multiple outlets in kitchen or bath)