I know someone who bought a disgusting do-er upper which turned out to need a lot more work required than she'd anticipated, so she decided to make it look better superficially and sell it on.
Upstairs and downstairs were covered in hideous, dirty, ruckled 1960s carpet but she would have needed to pay someone to come and take it up and dispose of it. so she laid the cheapest laminate she could find over the top. She pushed all the rucks in the carpet to the edges of the room and where she laid the laminate boards on top, she nailed them down to keep the floor flattish and stop the rucks lifting the boards. Then she got some old heavy furniture from a local charity shop and put it on top of the nailed-down laminate so that prospective purchasers wouldn't see it.
Later on she decided to paint over the old-fashioned patterned wallpaper and painted round the heavy items of furniture. I gave her a hand painting the skirting boards. I'd have sanded them down, cleaned all the dust and dirt off and washed them with sugar soap but she had me slapping the paint on over dead flies, dog hair, fluff, goodness knows what.
Before she put it on the market she changed all the bulbs in the place for 40w, so it was a bit dim.
One of the bedrooms didn't have an electricity socket at all, so she ran an ordinary extension lead from another room around the walls, under the edge of the laminate, then sealed it in. The end of the extension lead was under the bed, with bedside lights plugged into it.
She sprayed the kitchen units different colours using leftover car paint from a friend who worked in a garage. It looked good, though she didn't know how durable it would be.
It was bought by a young couple for about 50% more than she'd paid for it. They thought it looked lovely and fresh, apparently. It made me realise how some people just see the overall picture, not the detail. I've always wondered what happened when they realised what they'd bought.