I'm selling my professional studio equipment including an electric backdrop roller system with 6 rollers, 12-feet long. The system works perfectly, and has been lightly used over many years, in a hobbyist studio setup. (I also have a set of Alien Bees studio strobe lights, stands, and light modifiers - 4 lights in total - for sale - inquire).
This system would typically retail for around $4300-$4400 (see: (copy/paste link - to similar system at Denny Mfg. - link is here: https://dennymfg.com/products/backdrop-roller-system-abl-dx ), but as I am no longer using it at all, I am selling it for $699. I will include the 5 backdrops I have for it - all are 10' x 20' backdrops - 1 white, 1 black, and 3 that are colored/painted backdrops (will need washing since I had this system in an area that has become a woodshop).
The system includes a remote (that attaches to the motorized head unit) with 6 switches to unroll or roll up the backdrops. The system is very heavy duty (and pretty heavy - I'm guessing about 150 lbs total). The rollers will accomodate full 20 foot muslin (heavy) backdrops.
As shown in the photos. I don't recall the manufacturer as I bought this many years ago, used it for around a year, then have not had much use since then.
The dimensions I've given in the description are approximate (sorry - I haven't gone back to measure it yet!)