DOD · FX55
DOD started in Salt Lake City in 1974 and sold itself as America's Pedal. By the 1980s its FX series was a fixture in music stores, and DigiTech's own history calls the FX pedals the go-to effects for a lot of players through the '80s, '90s and beyond. The series began with plain, single-color boxes. In the 1990s the late Jason Lamb's designs took over with loud graphics and names like the FX69 Grunge and FX32 Meat Box. The FX55 Distortion comes from the earlier, plainer lineup. Collectors mostly chase other DOD models. Wikipedia names the early 200, 400 and 600 series and a handful of 1990s oddballs as the collectible ones, and the FX55 isn't among them, which leaves it as a pedal you buy to play. Judge each one on how it works. Guitar World says older DOD stompboxes were held back by a somewhat dodgy footswitch, so test that first, then the pots and jacks. A clean, working FX55 is a fun way into 80s DOD.
Guitar World says older DOD pedals were hampered by a somewhat dodgy footswitch. Expect worn pots and jacks on any pedal this age, and check the battery clip for corrosion.
We haven’t been through this pedal’s listings yet. Search eBay for the exact model and run every listing through the checklist above. Ask for a photo of the bottom plate and a short video of the pedal on and off through an amp, and pass on any listing that won’t show them.
Search “DOD FX55 Distortion” on eBay ↗eBay searchPlenty of used pedals turn up without a power supply. Check the power line in the specs above, then match the voltage and plug before you buy one. This searches Amazon for the usual kit.
Search power supplies ↗Amazon searchDOD · DOD 250
Overdrive250
Specs and what to check →

Boss · Boss compact
DistortionDS-1
$50–$75 typical ask

ProCo · RAT
DistortionRAT2
$150–$340 typical ask

MXR · Distortion+
DistortionDistortion+
$85–$170 typical ask

Boss · Boss compact
DistortionMT-2
$70–$85 typical ask