If you want a good deal, an undervalued gem, or a fixer-upper to make money on - buy a home at auction. That's the common theory, but does it actually work in practice? There's a chance you might find an underrated home, but there's also the risk that you may get caught up in competition with another buyer and overpay - as many who end up in a bidding war do. On this week's episode, we switch off Homes Under the Hammer and go watch some real life homes go under the hammer at a property auction. Reporter Grace Gausden tells us about the auction room atmosphere, and Simon Lambert, Georgie Frost and George Nixon discuss tips to make sure you stay on the right side of a bargain hunt. Plus, Simon explains the circular economy and why it's important to get capitalism on side to stop trashing the planet. And finally, buying a brand new car isn't very green, but you could save a lot of money on them at the moment as dealers are pre-registering them to meet sales targets and then selling them at up to 40 per cent off. The team explain why.