I have paypal, ebay, and 200$. What can I buy right now and sell for 100% return?
Ethereum in a couple of months.
But might result in much more than 100%.
More normie speaking though:
Art is a pretty good bet. Anything that has sentimental value and easily misjudgeable value. Sports things signed by some homo, stained panties of some slut.
Anything where there isn't a clearly defined market value. The liquidity will be nightmarishly low, but that will mean the market can easily gap 100% on these items.
Get on Craigslist. Offer to recycle old appliances. 40 bucks a pop, you pick them up . Break down and scrap broken appliances, sell working parts on amazon and eBay. Clean up working appliances and sell them to the poor and landlords.