This ad has been on my office wall for quite awhile.  I found it back in the mid 1990's when going through some papers in the warehouse; it came from my old friend Bill Pugliese who used to own B&L Sales, Inc. in North Hollywood, CA.

The complete system could be purchased for $3499.00; blank 8-track cartridges were additional.  The manufacturer Make a Tape, Inc. was out of Fraser, MI and it looks like they were set up to sell through distribution.   I have no idea how well these sold...I just like the great graphics on the ad. 

 The brochure I have is from 1972; blank 8-track tapes sold for $3.50 and you spent another 50 cents to make the copy.  It looks like a pretty nice profit margin...