97 of 360 Mercado Livre Cards Carry a Third Price. It Lives in a Sentence, Not a Price Field

Eleven days of the same Mercado Livre Brazil search produced 360 product cards. On 97 of them the real card price was neither the price field nor the original price, but a number inside the instalments sentence — and every single gap turned out to be a round 5% or a round R$20.