There's a million low gain, blues-voiced overdrive pedals out there. Many of them owe their existence to this iconic pedal. It hasn't changed a lot in thirty years; they're still great. 

Model: Boss BD-2 Blues Driver
Made in: Taiwan, 2018 (serial C3J0129)
Type: low gain overdrive 
Power: regular 9v DC negative supply or 9v battery, not included
Equivalent new street price (approx): $199aud
Mods: none
Accessories: original box and manual
Condition notes: used, no major marks, fully functional. Overall: excellent condition