hi vadnappa, hugsta is right with what they say. the only thing that i would add is that it is important to use uv light. without it the colours do tend to fade, in particular the yellows. another thing to consider, if it has been digging as it may just be covered in dust or dirt. sounds simple but you will be amazed how a wet wipe down can bring out the colours.( see pic below)
lastly, are you buying it as for the purpose of breeding or for a house pet. wild caught ackies do tame up a bit, but unless caught very young will never be as comfortable as a captive bred. they often seem ok in the shop, but once settled into their home can become snappy or timid.
hope this helps
