Actually, just thought of an example I saw just two months ago. At auction, the selling price for 20x sequential uncirculated 1973 $1 bills was $1.75 per bill, the start price of the auction was at $1.50 per bill. In that same auction there was a bundle of 1000x of the same bills in the original mint seal that also started at $1.50 per bill but ended up selling for $2.25 per bill. Small difference until multiplied but 1000. It could have been the larger quantity of sequential bills or people just had their eyes on the larger stack, but can't argue with results!