Cost = amount of people power, machine power, overhead and materials required to make something.
Price = Amount a person will pay for something.
Markup = The amount something changes in value between entrance into a business and when it exits.
The three are all important, but unrelated to you the end buyer. If it cost Joe Cue company $5000 to make a cue which has a $3 cue performance(hit, appearance, art), then it will be priced at $3. If Fred Cue company can produce a $5000 cue performance for a $3 cost, it will sell for $5000.
I would worry much more about a cue's worth. Worth is able to be determined off Ebay, if you can find it there or through Google with some research. Take those prices to your local cue dealer with the knowledge that he will charge more because, he can help you select the right cue based on hit, adjust/replace the tip, with shaft diameter or other minor tuning, should you not be completely satisfied.