No idea. I had to google it. It seems to be a term used in sales and marketing. The article was about Opportunity Product Fields - whatever they were!
It is a term I have never used, and will never use. But I guess it is useful to people working in sales!
So I don't think it means, "It's cheaper right now." I wouldn't say to my friends, "Hey! It's an opportunity product! Let's buy it!"
My friends would have NO IDEA what I was talking about.
Do you work in sales and marketing?