The first licensor was Takatoku, who produced the original 1/55 Valkyrie toys, which revolutionized the industry with their 'Perfect Transformation' system. Later, Bandai would get the molds and begin to produce new toys of the series. Gakken produced merchandise for the Mospeada series, later to become Robotech the Next Generation.
Meanwhile, Harmony Gold was preparing to license the toys in the USA. The main company producing Robotech toys in the USA during the shows original run was the Matchbox company. They imported some of the smaller mecha, as well as the large SDF-1 battle fortress. Matchbox also created a series of original toys and 3 3/4" figures, as well as larger dress-up dolls for girls.
After Robotech had all but faded into obscurity, Playmates decided to re-introduce some of the Robotech toys into their Exo-Squad line.
In Japan, Yamato got the license to make an assortment of Macross toys, starting with toys from the anime Macross 7. American distributor Toycom intended on distributing these in the states but could not because of an injunction by Harmony Gold, who claimed they had the sole rights to Robotech in the USA.
After that fiasco, Toycom split and became two companies – Toycom and Yamato USA. Toycom secured the rights to Robotech toys in the USA and has come out with several different toy lines based on the property. Bandai and Yamato remain the primary manufacturers of Macross toys in Japan.
What's it worth? Take a look at this Macross price guide: sold listings for a value indication.