Most of my way of telling a bad flip came from years of renting. What are all those cheap things landlords do that are annoying. Certain appliances that you find in large rental company properties and individual properties. Smells both good or bad. There should be no need to light all these candles unless you’re hiding something. Touch everything. Does the paint feel like quality paint or a finger nail could take it off? Just inspect things and ask questions. Try to look past the staging, you’re not buying the stuff and they’re trying to sell a product. Also, you can ask a seller to provide dates for when things were done. I bought a place (not a flip) and they sellers listed new roof last year, HVAC in 20XX, etc. I could tell the water heater was older because it doesn’t have that extra price but that’s fine I’ll use it till it breaks then it’s time for unlimited hot water 🥳🧖🏻‍♀️.