Last 10 years I've shopped at estate/yard sales.
OOTD; new Wrangler shirt was $1, new Duluth Trading pants $2.50, new Duluth boxers $2 & shoes, like new in size 14 $2. Pants, boxers & shirt still had tags on'em. Not often I find stuff in my sizes but got lucky; 3 pair of shoes, 3 pants, 2 boxers, 5 shirts & 14 hard cover books for $19 total.
You can find a lot of daily use items new, unopened for pennies on the dollar. 3 bars of Dial soap .30, older Tupperware bowls w/lids for .25ea, qt size 90% alcohol n H2O2 for .25ea still sealed, 3/4 full 96oz Tide $2, 4 18650 2600mah batteries $2(they all work), 3D cell Maglites for $1, Surefire X300 for $10. Food stuff can be had also, sealed 3lbs can of coffee for $3, soups(Chunky) .50ea, Dawn dish soap $1. HP i5 quad core, 16g ram, Blue ray drive w/2t HD desktop for $10, had to wipe the drive & install Win7 but everything works.
Add in the tools, craft & hobby items & I know I've saved $1800 or more on just what I've bought this year. When you're working PT & making under 12K/yr you gota save when/where you can even before this silliness w/inflation started, happily I haven't had to sell anything I didn't want to sell