i'm assuming your asking for websites to purchase cues from. both www.budgetcues.com and www.seyberts.com have good prices and carry all of those brands. Also Joss and Lucasi are nice hitting cues for not alot of green as well.
I believe all the manufacturers limit discounts by vendors to 20%. Since you can get these cues at the same price from different sites, look into the extras like free shipping and free cue cases.