What are these worth? Chris Pardell 1988 Set

[Boylen]

I have a set of 6 Chris Pardell Legends Sculptures that I bought new in 1988 when they were first released. The set is one of 750 sets made. Each sculpture is hand signed and numbered out of 750. The names of the sculptures are Crow Warrior, Red Cloud's Coup, The Final Charge, Sitting Bull, Triumphant, and Pursued.

Anyone have any information on what these are worth? Thanks!