A couple of rules of thumb about boots:
--If they're comfy in the shop, they're likely too big.
--The boot fitter can make the boots bigger but not smaller.
--(Stated above) Expect to return to the fitter for adjustments as you get some hours in the boots. They need to be tight and without discomfort. Expect a hot spot or two, and the fitter will fix that on your next visit.
Skis: Good used skis are fine, as well as used demo skis of the previous year's version. As long as they are suitable for you. There are many very good skis out there. Not many of those will suit you. As Phil said in post #14...sub-80 mm waist width, carving which means more of an hourglass shape...maybe a side cut radius of 15 meters or less. In general as skis get longer they get stiffer. And expert level skis will be stiffer than intermediate level of the same size. Women's softer than men's, 'cuz the ladies don't ski hard (
). You need skis that respond to the energy you put into them, your weight, your speed, somewhat your height. Give us the make, model, and size of skis that you're on now. Give us your height and weight and whether you ski fast, medium, something in between. What type of terrain do you like to ski on?
Powder7 is a shop where I've bought excellent used demo skis at a very fair price. You will probably find suitable skis locally as well.