found this information and I think it could be a great help, hope you enjoy it:
since tokay geckos in the pet trade are wild-caught specimens imported from southeast asia, the chance that they will have an illness or injury is greatly increased. it is important to observe the apparent health of the lizard(s) you are considering purchasing. sickly looking animals are not a good choise as usually they will quickly die from the stress they have already been exposed to.
first, look at a group of tokay geckos or at an individual specimen that has caugth your eye. healthy lizards tend to be active or reactive, in the case of tokay gecko. the eyes should not be sunken in, and the lizard should appear alert and mobile. don't allow the sales person to rush you. take some time to observe the animal you are interested in. observe how it rests. a healthy tokay gecko will rest vertically on an enclosure wall, either facing up or down. it will not be resting on the enclosure floor. also observe how it moves around the enclosure, be sure it's not dragging a limb or does not appear to have other difficulties in getting around. next, when its mouth is open, look closely to see if it has a ball of mucus or excessive fluid in its throat. also look for bubbly fluid protruding from its nostrils. either such condition would indicate that the lizzard probably has an advanced pneumonia-like respiratory disease from wich it is unlikely to recover, even with expensive vet treatment. if there is a group of tokays in the same enclosure, try to observe all of them in a general way. if several appear to be sick looking, be aware that the others have probably been exposed to the same bacterial, or viral disease, or intestinal parasites that the sickly looking lizards are suffering from. in most cases, a tokay gecko in poor health will be thin, and will have a very background color with little or no bright orange or red showing. it may also have visible wounds, sores, absecess, or lumps on the body. an original tail should not be kinked. regenerated tails are common and nothing to worry about.
once you have decided on a particular animal, you should ask permission to handle it (at your own risk), caution and good sense must be used when handling them. a healthy tokay geckofeels relatively heavy for its size when held in the hand. the lizard should demonstrate a high level of muscular vigor, a healthy tokay geckoshould have a rounded tail that shows some fat reserve and give an impression of fullness, another healthy sign is good weight around the hip area. if the pelvic bones protude out then the animal may be malnourished or possibly diseased, you should avoid choosing such animals as it is unlikely they will recover, even with proper care.
when large numbers of wild-caught lizards are being shipped togheter, overcrowding may result in fighting, leading to injury. tails, limbs, feet, and digits can be easily damaged. examine limbs, feet, and toes carefully for unusual swellings, extensive damage or limpness. check the body for skin rips on both the back and the belly, look at the vent, to make sure there is not smeared feces, indicating diarrhea wich would be a sign of disease or a heavy internal parasite load.
examine the sides of the torso fer depressed areas or projections indicating broken ribs.
examine the lizard's head at a distance not too close to your face, the tokay's head should have no mayor wounds, lumps, or swellings. the mouth will surely be opened, making the next part of the inspection easy to accomplish. the normal color of the inside lining of a tokay gecko's mouth is black, with the tongue a pinkish-red color. the eyes should have no cloudiness. look closely to make sure there are no mites between the scales aroud the rim of the eyes and elsewhere on the head and the body.
hope it helps!!!!
VIVA MEXICO CABRONES!!!!!!
