I just got a $50 gift card from a family member last night to the website TCGPlayer that I use to buy single cards and I used the entire thing in the same night because I already had my cart stocked with commons and uncommons, rares and reverse holos that I needed for some of the master sets that I'm trying to building.
Presently I have way too may sets going and I know I may not end up mastering them all but the further I get, the further along my kids will be, when and if they ever pick these up and continue on with them.
If nothing else, I'm having a blast doing this.
I just bought about 220 different cards on TCGplayer which is the largest quantity order that I've ever placed on there.