Big Trak (not to be confused with the new edition from 2010 called 'Bigtrak') is a programmable electric vehicle created by MB (Milton Bradley) Electronics in 1979, and looks like a futuristic kind of Sci-Fi tank or utility vehicle.
The vehicle has an optional trailer (the BigTrak Transport trailer) accessory which could be purchased separately for $13 USD (in 1979) to pull around small objects.
Other programmable vintage toy cars:
What's your 'Big Trak' worth? Here are some recently sold items (USA).
|1979 Milton Bradley Electronic||08/2019||$178.99|
|100 Working Milton Bradley Mb Electronic||06/2019||$124.99|
|100 Working Milton Bradley Mb Electronic||06/2019||$150.00|
|Milton Bradley Mb Electronic Truck||08/2019||$119.00|
|1979 Milton Bradley Electronic||07/2019||$99.73|
See all sold items for more prices.
If you're not sure what you have, you can post your question below, and maybe I can help.