I was also a Middle school/High school hustler
At first i sold pens and pencils, making 50 cents a pencil and 75 cents a pen, my mom worked for the County at the hospital and she managed all the warehouse orders at the time and she'd bring boxes of pens and pencils that were just lying around not doing anything...I had about 20 boxes filled with 500 pens and pencils each box. I SOLD THEM ALL!! I dont remember the profit, but i used the money i earned from that to buy more product to sell for my next hot item
CANDY!...everyone loves candy (Well...i dont,...except chocolate) When i was young...Every kid came out on halloween to grab Sacks and sacks of candy from all the generous people, i mean i would take 3 of those pillowcases from those BIG ONE's pillows and fill them all up the brim. (nowadays i barely see one kid dressed up, and even then its being escorted by their parents to each house in their SUV...WHERE HAS THE TRUST GONE!!! KIDS WANT CANDY PEOPLE ITS HALLOWEEEN FOR

SAKE!) all the candy i got was collected and never eaten...(Still dont like candy, too much sugar makes me naseous) and it was sold over the next couple of months at school where i made tons and tons of cash off of all the Latchkey kids.
Then it was books, then it was POKEMAN CARDS! hahaha...that craze was funny as shit, I never understood the big deal i would sell guys these cards at 10 bucks a pop, sell the more expensive (oooh shiney!) ones at 40 bucks and then steal them back later and resell them to the same guy or someone else....It was a goddamned goldmine!
Then another craze was the Yo-Yo's, that didnt do to well, but i made some decent dough off it SELLING NYLON STRING!...jezzus.
Then it was burned CD's, and those made a decent profit
Then it was Video games, and movies and now....I HAVE A JOB BITCHES!