Here on page 521 of the Sears 1969 Christmas Wish Book are a couple electric slot car race track setups. It must have been a few years later that the ones with the loop-the-loops were added. I really wanted one of those fancy tracks, but was lucky to even get the simple oval track that I did get.
Use the U.S. Bureau of Labor Statistics' inflation calculator to see what items cost in today's dollars. That $29.99 Slot Car Set at the bottom of the page would cost $178.72 in 2010 money.
Here is a YouTube video of a vintage slot car set.
Posted November 20, 1020