Drugstore Haul / Do You Have a Price Point Discrepancy?

I picked up a few drugstore goodies. Firstly, my staple Ardell Fashion Lashes (better than MAC imo) in a demi cut for more a natural-looking false lash look (if at all possible). I also nabbed those two CG eyeshadow quads because they were buy one, get one 50% off. After buying two energy drinks for my boyfriend and I, I left the drugstore with a $20 tab. I remember saying on the way out, "How did I just spend $20 at CVS?"
Which got me thinking... It's strange, I'll drop $20 on one high-end eyeshadow alone at Nordstrom, sometimes more for a single lip gloss at Sephora. But why, when I see an $8 price tag on a lip color at the drugstore can I not suffice a reason to buy it? $8 is too much for me for a L'Oreal lip gloss, when I'll spend $25+ on NARS gloss. Same for eyeshadow. I know I'm spending more for quality, but it still amuses me that $8 to me is a drugstore splurge when anywhere else, it would be a total steal.
What about you... Do you have a price point discrepancy when spending at the drugstore versus a department store/boutique?
I totally understand your "dilemma" with spending that much money on a L'oreal lip gloss. If it's $8-10 I'd honestly rather head other to somewhere like MAC and be able to try it on and know I like it.
I usually only buy "expensive" drugstore products if they're on sale. I try to stick with things under the $5-6 mark too, usually. There are a couple of things that are more pricey, like L'Oreal HIP cream liners, but I felt like those were worth it.