As mentioned $20 to maybe $30 is all I would pay for a pool cue used has a house stick. I would never use anything but a one piece pool cue for a house stick so you should have s good selection of sticks in that range.
In general cues are turned several times before you get to the final finish turn, with dry time of months in between each turning. It can and does get more involved and I'm not just talking about fancy inlay work in the butt of the cue. These days there is a lot of technology crambed in there depending on the quality of the cue. Laminated shafts to get the proper flex used for dampening, the right taper yet have it stay straight and weight proportionate etc. The inlay work is nothing more then for esthetics all be it a lot of work and very beautiful in some cues.