We all know many EFX pedals end up on the used market. I bought a Vox Wah 10 years back and 99% of that time its been in its box. Delay is another one...interesting for a time. Tremolo has its place here and there..the odd bit of Flanging...it seems overall overdrive & distortion plus a good reverb are the main essentials to most songs/ instrumentals. Without Reverb an amp is dead. Many vintage amps did not have one .. One effect I would like to replicate is that on the intro to the song "If" by Bread sung by David Gates. This is going back to the early seventies and was done in the studio. not sure there is a pedal that can do that...?