Sorry for the relatively poor pictures, but this thing is in use and I didn’t want to remove it from the rack! Obviously, this listing is for the DBX 160SL only in the photos

Electrically in excellent shape. cosmetically some minor scratches as you can see in the photos.

from Sound on Sound:

As you would expect at this price point, the support circuitry and mechanical design are impeccable, and include the new and impressively specified high‑performance dbx V8 VCA to look after the gain control. This is a huge device potted in an aluminium heatsink‑style case to maintain an even internal temperature — this is important to maintain matching between the multiple transistors used in the gain‑control circuitry. Additionally, there are audiophile‑quality input and output stages, Jensen audio transformers, and a sophisticated power supply, but behind all this the aim is to give the user access to the compression characteristics that made the dbx 165 and 160 models famous during the '70s. To this end, both hard‑knee and soft‑knee compression modes are implemented and, according to dbx, it's possible to make the 160S sound like a 160, a 165, a 166 or a 1066. This feat is accomplished not by emulation, but by duplicating the key control elements from these different models and physically switching them.