I'm not sure about the Saharan Uromastyx, but the Egyptian and Mali needs to the night temperature of about mid 60's F in order to do well. From what I've read, the Saharan are from warmer area with less harsh winter, so my guess would about 70 degree at night would be good for these guys. It takes mine about a week to two weeks to fully acclimate to the cage when I first brought them home. It really depends on each individual. You should first let them get acclimate before shipping them off to someone. This way they'll be less stressed out when they actually have to go to another home.