They look like the have potential to clean up and be decent bikes... with the investment of some elbow grease and chains, cables, tires and tubes.
+1 100 each is generous... I would probably offer $150 to $175 for the pair if I was going to refurbish and flip.
Value refurbished with replacement of chain, cables, tires, and tubes... I would ask $250 for each bike and hope to get between $200 and $250.