Anything below 300$ you might as well just get headphones my dude.
Probably true. If you're dead set on getting beginner monitors for well under $300 for a pair, look at ones like Mackie CR3, M-Audio AV32, PreSonus Eris. They do the trick for a lot of people, and hey if you absolutely hate them then you'll know you need to save up at least $300 for your next pair. This goes beyond what you're asking but I can't recommend enough reading over a studio monitor buying guide (this one is helpful too) and understanding why - or why not - you would opt for certain things like speaker sizes, sub or no sub, passive vs active etc. For actually good monitors around that $300 price point, people rave about the JBL LSR305s. They're legit.
Worst idea: oh shit.. I have some money in my pocket, lets get some speakers based on what other people say about them. You don't know what their stake is.. people will defend their purchasing decisions to the hilt, they're not just defending the product itself. They're defending their personal decision as to why they bought this model and not a similar one, but also why they didn't go for a cheaper or more expensive option. The cheaper will always be trash for them, the more expensive one always 'not worth it'. It's just psychology. Some people will just outright be marketing shills too.
"maybe you can snatch up a 600 dollar speaker for 300. "
ya you can buy them used. I got mine like half off the retail price from a homie.