It would help others to know what you are shooting at the moment. You might have some gear that is perfectly serviceable and does not need replacing. For instance the quiver, its basic function is to hold arrows, there are other quivers with lots of pockets or leather ones but is it worth spending money on them? Will all those pockets and extras make you more accurate? no. Most archery shops will have some second hand gear. have a look at that first. The case for instance a new one will look shinney and clean but if there is a second hand one available with a few scratches on it but clean and solid on the inside is it worth paying out for the new one?
With other items that dirctly affect the accuracy then second hand items become less of an attractive propersition. I have bought a good Toxonics sight from a shop but you must examin things like that very carefully. Another item is a stabaliser you may find that some one has bought a stab and can't make it suit their bow or their particular likes and dislikes,some times these items end up back at the shop I would not think twice about buy a second hand set of
beiter stabs from a reputable archeryshop as an alternative to a new set of Cartel stabs .
Risers and limbs are perhapps some thing that you should buy new, but how much on what items depends where you are and how you are progressing in the sport. If your draw lenght and draw weight have reached a point where they are constant then it may be better to spend a greater portion of your money on limbs and arrows because they are not going to need to be changed for quiet a while. If you are at the the point where you are finding the bow easier to draw each time you shoot then it will not be that long till you need heavier limbs and stiffer arrows, so why spend a lot on some thing you are going to have to change fairly soon?