‘Best skincare purchase I’ve made in years,’ shoppers rave about serum with ‘instant benefits’ – it’s is on sale for $16

BARGAIN shoppers can’t get over a beauty serum that they say works instantly and is less than $20.

One fan raved that it was the best skincare purchase they made in a long time, and the $16 anti-aging buy is currently on sale.

An affordable serum is flying off the metaphorical shelves for its fast-acting benefits.

Originally, the serum retails for $17...