If you have flavorless pedialyte or fruit punch gatorade, the best thing you can do right now is to make sure it stays hydrated. I would try getting a drop or two in it with a feeding syringe, and in a couple hours to repeat it. Continue giving it saunas as well, cresteds can absorb moisture through their vents. If it stays hydrated, it gives you the chance to wait until tomorrow morning to bring it into a vet.

Without photos I cannot tell you if the black you are describing is normal, as is in some crested geckos, or if that is a symptom of something going on. The leg-dragging almost sounds like stuck shed to me, but again, without seeing it I can't tell you much.

The scab around the vent is what worries me, there shouldn't be visible black and red scabs in that area. Is it possible the crestie had some sort of prolapse?

You and your crestie are in my prayers.

i will buy some pedialyte from the drug store close by and keep it in a sauna as long as i can until tomorrow morning. i will post pictures of it in a bit another thing is it stays there looking life less the only reason i can tell is alive is i nudge it a bit and it opens its mouth at me. but besides that its hard to tell its even breathing. i can tell theres stuck shed for sure on its hind left leg but you will see in the pictures.

another thing it lost alot of weight in a matter of days i git it back on sunday and it was as chubby as its sibling but now it super skinny.

by the way the brown stuff on its lip is CGD from trying to feed him. it did take a few lick but then refused to eat any more.

Poor kiddo, he looks the way one of my geckos did when it had Entamoeba invadens. He had a swollen vent, became listless and dehydrated.. If you can get a fecal sample, bag it up in a sandwich baggie and put it in the fridge. If you can get some liquids in him, I think he should have some time to de-stress(especially after seeing the pic of him just laying listlessly on his back). Really, until you can get it into a vet, that's about all you can do for your gecko. Be sure to wash your hands thoroughly between geckos, and I highly recommend getting a fecal done on your other geckos too just in case. Vets usually give discounts for multiple fecals.

i was able to get three drops of gatorade in his mouth he seemed to move a bit more. i have been hand sanitizing after im done touching him not sure if that works though? i will be taking just him tomorrow i get paid on friday so i will take the rest on that day. i found no fecal in his tank i cleaned it out yesterday and it hasnt deficated since.

thanks for all the help im hoping it makes it until tomorrow and if it doesnt im still taking it to the vet to see if they can do an autopsy and determine the cause.