They are worth about $1.00 each.  Unless they are painted really well, a painted mini can actually be worth less than an unpainted mini because they have to be stripped.  I did not note any rare or unusual minis, but most of that had to do with the crowding of the minis and fuzzyness in some photos.  The monster minis are going to be valued slightly higher than the humanoid minis.  I recommend selling the monster minis in a lot, the painted humanoids in a lot and the unpainted humanoids in a lot.  Make sure you state in any listing that some of the minis likely contain lead and are not suitable for younger children.