You're going to get lots of advice and opinions. It really comes down to this and nothing else...........You can buy someone else's cue & obviously that person's cue specs..........or you can order a cue and get exactly what you want in a cue weight, butt diameter, shaft weight & sizes, etc.
Those are your options and when you buy a cue versus ordering a cue, you wind up getting a cue someone had ordered with their cue specs which are probably different than yours. Make sure you know what you want in your cue and browse cue dealer websites and AZ, e-Bay, anywhere you prefer. You'll get a feel for "used" cue prices and even new ones and see how close you come to finding what you want. Don't settle for a 19.4 oz cue if you really want a 19.0 ozs., or shafts that are 13mm when you really prefer 12.85mm or a cue butt that's a little too fat versus one that has a diameter more comfortable in your hands. This is your first venture in high end cues and so do it right..........or else you'll eventually want to do it over.
I couldn't find a ivory joint cue with the weight I wanted even though I listed 17 cue-makers in my thread.....only one cue even came close. Sellers tried convincing me that the weight difference in their cue from what I wanted was insignificant........yeah, to them because they wanted a sale. But for me, I insisted on getting what I want, and only one cue came close and my budget was mentioned in my post ($2500 - $4000). I also contacted many cue dealers to try locating a cue but nothing ever came from it, except one and that cue was more than I wanted to spend. So I decided to have a custom cue built to my "exact specifications", even down to the forearm and butt sleeve designs. I considered 7 cue-makers, checked out their reputations, cue workmanship and selected one to build my cue. Now it's going to take 8-9 months to get my cue but I'll wind up with exactly what I want instead of some other cue owner's specs if I had purchased their cue.
Your biggest challenge is to exercise patience, and thus refrain from buying any cue based on its looks or the cue-maker's name. However, if you haven't sufficient playing experience to know what you really want in your cue, then blast away and buy anything you see that you like. And in all likelihood, you'll going to eventually change cues down the road when you perfect your game unless it's already at that stage. Rest assured, with your cue budget, you can buy some great cues but there are still cue-makers you can't even touch unless the cue was a SP or a merry widow version......those are cues you wouldn't want to consider even it the cue was made by Joel Hercek, not when you can buy another cue-maker's much more handsome cue for a lot less too.
Make a sale thread in the Wtd Sale/Buy section and describe exactly what you want, or the cue-makers you're interested in and sit back and sort thru the replies. You list a budget of $2500-$4000 and you'll get assaulted with offers which you'll have to sort out on your own.