You can purchase a product with BUY NOW at the full RRP shown OR purchase a TOKEN.
The TOKEN option will enable you to see if there is a discount available on the Product.
If you then decide to BUY you will receive this discount Off the RRP shown.
However, if you decide not to BUY you use up your TOKEN and the TOKEN value will roll over to the next Customer who will therefore receive a bigger discount.
This process will continue until the product is sold. Potentially enabling a Customer to gain a big DISCOUNT off RRP.