Price evaluations are unreliable. Its not worth having a “sort by estimated value” option. A “sort by amount paid” would be nice though.
Im pretty sure those evaluations are just an average amount on what Numista users have paid. So someone may have paid $25 in 2012, when it was brand new, but someone today would have spent $300. It doesn't adjust to what the coins are actually worth on the current market. For example, my $300 coin is only worth $25 according to Numista. You can't buy this coin for even $100