The pet store I get everything for Lux at has a teeny tiny beardie that isn't doing too good and I'm thinking about getting it and trying to nurse it back to health.
They said it hardly opens its eyes and hardly eats and never wants to leave the water bowl.
If you do get it make sure it has it's own enclosure with the proper lights, temps, uvb, substrate, have baby food ready just in case, make sure you have the calcium and the vitamin supplements you need and maybe see if they would give you a discount too as this beardie may take some work.
has it eaten anything yet? and is your uvb a reptisun 10.0 tube or the arcadia 12%, proper uvb is very important especially for one that was showing signs of lethargy in the store, as stores generally do not use the right lights.