Matchbox SuperKings K-8/3; Caterpillar Traxcavator

K-8/3 the Caterpillar Traxcavator was released in 1970 and apparently remained in the range for 10 years as the next K-8 is listed by one of my sources as being released in 1980. The shovel assembly is usually orange, sometimes yellow, the main body can be yellow, orange-yellow or silver-grey. One of my sources quotes a very high value against the all-yellow version, another puts high value on yellow with an orange loader, neither distinguishes between yellow & orange-yellow, but both agree that the silver grey one is worth finding.