Boss do the most famous chorus pedals of all time. This is a recent example, but it's a worthy part of that great heritage. It's wild how much a brand new example costs these days, so hey this 9/10-with-box option sounds clever to me. May the wobbles be ever in your favour. 

Model: Boss CE-5 Chorus Ensemble
Made: Taiwan, recent model
Serial: N/A
Type: chorus
Power Input: standard 9v DC centre-negative (supply not included)
Accessories: original box and docs

Condition notes: used, no major marks. Tested and fully functional.
Overall: excellent condition (9/10)