We are in the process of buying and selling some electronics, and ML has been a pain. Some people just comments to make fun or jokes, or to chat. Some are trying to get impossible discounts (like half the price) hoping someone is hungry for money or in a desperate situation.
So far, we have sold one of the iPhones and ML's fee is 10%! A lot of people want to stay on ML for added protection on their purchase, which is understandable when spending a certain amount of money. Which amount? That's very subjective. I still laugh at clerks who check the authenticity of a 1000 pesos notes (which is less than 5 Euros, folks!), so anything above 3,000 ARS must be quite a purchase to some.
Prices are also all over the place. We started with our phones being priced at 115 and ended up closing at 80, minus 8 lucas in ML fee.