basically, had some bloke ask me via email today when he will be recieving his memory card, and tbh, i dont think ive sold him one

i have nothing in my last 60 days sold items with his username, so is there a way i can search the items ive sold before this? or a search the items this guy has bid on and won? just to make sure

also, he sent me an item number which didnt work, and he contacted me through the "contact member" button

cheers