Posted by Huwbot,
Monorail Accessory Track
©1988 LEGO Group
Today's random set is 6921 Monorail Accessory Track, released in 1988. It's one of 12 Space sets produced that year. It contains 46 pieces, and its retail price was US$34.95.
It's owned by 792 Brickset members. If you want to add it to your collection you might find it for sale at BrickLink or eBay.