The 1st and 4th picture looks dead. The birdsnest in pic 3 and the montipora in pic 5 look nice so if they turn out to be healthy, they could reasonably be worth $25 all on their own depending on where you buy them from. Can't really tell about the monti in the second pic.
"The simplest explanation for some phenomenon is more likely to be accurate than more complicated explanations." -Occam's razor