Modern snake-oil vendor selling over the loudspeaker in Mercado Sonora, Mexico City

"Cramps, sprains, coldness, inflamation, People who go out and later feel the effects of the cold, coughs that last weeks and months, anti-inflammatory for the brochials, chest and back, a miracle to cure that rheumatism you've been suffering from for years, we bring it to you today at a special promotional price to cure any ache or pain in any part of your body, guaranteed, the original Gris Marvel..."