I had never seen an Aggressor on the rear until that pic. Weird.
Ken or Michael, what tires are on the '75/'76 Goose in the "full bike pic" shown in the old catalogue? I thought they were Carlisle Aggressors...
Those are the Carlisle Aggressor MX (not to be confused with the MX-200 and MX-300). It took me about two years to find the ones on my Mongoose. After that I was able to come up with a couple of others that are now on other bikes.
Most people used them as a front tire with a Cheng Shin on back. I personally liked them on the rear.
Good used Aggressor MX usually go for over $100. NOS over $200....each.
I'd put the NOS price at $300+ and with minty ones at $250+. Well-used seem to fetch $60-70ish.