Got a r34. How to tell if it's treasure hunt?

Hey Reddit I just got into collecting hot wheels a couple weeks ago and I always look up the prices after I buy them. I looked up the Nissan r34 and saw some for 40-60 dollars and the listing says treasure hunt. I don't see anywhere where it says treasure hunt on the package at all. Sorry for having no knowledge. Also where is the best spot to purchase them? I always look every time I go to Walmart but that's it.

It was a dark green and black r34.