I have had some transactions with buyee to buy stuff from mercari. Most of it went smoothly. Pros - Full English support. You don't have to use Google translate to communicate with the seller and risk miscommunication. Customer Service is rather responsive, though I think recently it took them longer to reply. A few years back, they'd reply within the day or early the next day. - You get updated with the status of your order (bought/arrived at warehouse/etc). - The flow is clear and detailed. Cons - Not recommended if the item you're interested in is highly sought after. There is a delay between when you confirm the order and them buying it, so there's a chance that it'd get sold out before they could secure it for you. - Also not for items sold in bulk and if the request is complicated - "I only want Item A from Event A but not Event B, but need Item C from Event A and Event B" - it's hard to tell what you really want unless the listing clearly distinguished them by numbers/labels. I explained it to one CSR but another CSR would take over and ask again, the cycle seemed endless. I ended up getting extras because I just wanted to buy it before someone else did. - The service fee is the same for all item prices. Even when you're buying a 300 yen item, you pay more for the standard fee which is at least 500 yen. I wish they could lower it for smaller items.