Over the past 20 years, I've purchased 2 custom cues, virtually new, both from dealers, both are from very well known but I would not call them great known makers. Both were purchased in the $1,500 to $2,000 range. Neither was purchased to play with, but for investment purposes only. I sold them both within 10-15 years for a modest profit.
As far as a cue purchased for myself to play with, I recently purchased a new cue direct from a dealer, a high end production cue, wrapless plain model with a high end LD shaft - spent $1,200+ with my dealer discount. So far I'm very happy with it, but to some degree it was purchased as an investment as well, knowing I should likely be able to recoup my investment down the road if I decide to sell it.