Hamner, welcome!
I have to say I was hesitant to spend too much on a sgian dubh, so I purchased a less expensive model first (not a Rab Gordon). It is a decent enough looking knife, but it came with a very dull stainless blade that has taken a long time to work an egde on. I ordered the culloden from Rab on the faith that the blade would be of much better quality, and I have not been disappointed. I spent a little time last night honing it with my wetstone and it takes and keeps and edge very well. Try to look for a knife with a carbon steel blade as it will be easier to pull an edge; stainless has it advantages but all of the stainless blades I have owned over the years have been harder to maintain under the use I put them to. Most of the custom blade makers are going to be in the 150-200 USD and up range. I have seen some Rab Gordon copies (whether they were licensed or not I don't know) that were a bit less but not hand made.