@David6733 There are several threads on this forum in which hosts discuss how to spot a red flag guest or booking. One of those is guests who ask for discounts- they are right off the bat disrespecting you and your property. The majority of hosts are charging what the market will bear, according to the prices in their area for what they provide, and don't overcharge, as that would discourage bookings. A guest who expects a host to care that the guest can't afford or doesn't want to pay what is listed is a guest to be avoided. There are plenty of cheaper listings, no doubt, that they can book. They can't expect to choose a nice place and then ask to pay the price of a 4 bunkbed hostel.
So search for threads here on red flags to watch out for when choosing whether or not to accept a booking- it'll help you a lot going forward.