You know why they call them sales "expert". Because they are expert in selling the stuff where they earn more profit.
You will have to mention your budget. Remember one thing, make sure you buy a good enough processor and a good motherboard (that heat dialogue is a cliche from salesmen since ages). People end up getting those good processors but sad boards like jetway and from companies who don't really have any standard in quality that eventually they die after 3 months. To add more, there's a pc build template and its stickied for a reason

. For your good, its best to fill that up.