It's not that unheard of for monkey breeders to ask for a deposit but ensure that you have proof of that deposit. Ahead of getting your marmoset, be sure your breeder or broker has an USDA license. From the United states it is illegal to offer primates without an USDA https://andersonvgpyg.ourcodeblog.com/28496098/details-fiction-and-pet-monkeys-for-sale