Set a filter, something like LB/RB/LM/RM, Silver and a popular nationality e.g. Spain. Do a search on FUTBIN on that filter and check what the cheapest card is. If it's 700 or above then it's worth looking at. Then mass bid 400 on pretty much every card, wait and see how many you get. Can pretty much sell them all at 800-1000 but you occasionally get some at 2000. It helps me as I bid during the day in Jakarta which is the middle of the night UK. Still managing to do it now though.