This is a cool idea, and as per usual with Boss, it's well-executed. There's 100+ effects built-in, so you can build yourself patches running up to six of the internal effetcs at once. Then, there's three separate send and return loops, so you can add in all your favourite pedals with ease. Then, you can setup patches with both... dang, you're gonna be such a smooth operator.

Model: Boss MS-3 Multi-FX Switcher
Made: Taiwan, recent model (serial Z417560)
Type: looper/switching/Multi X
Power: standard 9v negative supply (not included)
Switching: true bypass
Equivalent new street price (approx): $629aud
Mods: velcro attached
Accessories: original box and manual
Condition notes: used, few minor marks, very good condition