Marshall pedals are pretty underrated as a rule, and this is a good example. Heaps of tasty stereo modulation effects on tap in a small, robust box with easy controls... nice! Handy addition if you're figuring out what modulation effects you love and what you can leave. 

Model: Marshall RG-1 Regenerator 
Made: China, 2005 approx
Type: multi-mode modulation
Power: standard 9v DC supply, 80mA draw approx
Switching: true bypass
Equivalent new street price (approx): $139aud
Mods: none
Accessories: no box or manual
Condition notes: used, few minor marks, very good condition