Sometimes it psychological thing, If I bid its KO R20, If I dont they sell straight away, normally used to work for me like that as well when I bid in the lower levels but I mostly but scouts now anyways. You definately don't find players like Miku everyday on the transfer market for 2T, especially at the start of the season.
I've done with PTing Seaman and Adams, left them both at 7*106.