I've got quite alot. Best would be a non-basic draik MP, sold for 19mils. ATM, I have ABed more than 15 items worth more than 10mils each.
My best is probably a krawk/draik MP when they were 17m+ probably Pirate. Besides MPs, it's probably a Ultimate Dark Reflectorb thing and then a hundred million neopoint stamp (not worth 100m unfortunately)