Deion Sanders' run at Colorado won't be interrupted by just any old school with a bag of cash ... no, according to Buffs legend Chad Brown, only a "true blue blood" will be able to pull Coach Prime from Boulder.
Brown tells TMZ Sports ... he was initially concerned that smaller schools across the country might be able to sway Deion to leave Colorado if they could simply offer him more money than CU. But, after Sanders' noisy 3-0 start to this season ... Brown's now sure there's only a handful of universities in the nation who can grab the coach's ear at this point.