I get the frustration, honestly. I tried a cheap unbranded mount a few years back and the riser cable was so flimsy it caused constant crashes. While the previous suggestion works for some, I'm a bit more cautious when it comes to expensive hardware and prefer something with better structural integrity. In my experience, you want a kit with a reinforced base so it doesn't just trade one kind of sag for another. Since you're a beginner, I'd check these out:

• Cooler Master Vertical GPU Holder Kit V3 PCIe 4.0
• Phanteks Vertical GPU Bracket PCIe 4.0 The Cooler Master one is great because it's adjustable, making it way easier to fit into different mid-towers. It's slightly over 50 bucks but worth it for the stability. Just make sure your case has 7 expansion slots... if it has metal bars between them you might have to snip them, which is kinda scary for a first timer.

Honestly i was in the same boat last year. Sagging cards look terrible and can actually mess up your slot if you arent careful. I ended up getting the EZDIY-FAB Vertical PCIe 4.0 GPU Mount Bracket and I have been really satisfied with how solid it feels. It fits right into your 50 dollar budget and its a direct fit for most mid-towers. It hasn't given me any signal issues which was my biggest fear when shopping around. Just make sure your case has enough clearance from the side glass so the fans can breathe. If the card is too close to the panel its gonna choke for air. I have been using this setup for months now with zero complaints. It keeps everything looking clean and sturdy without spending a fortune on those overpriced premium brands. It is basic but it works well.

• honestly im in the same boat with my sagging card
• everything under fifty bucks seems way too risky...
• if i find anything good i will let you know

i spent ages trying to fix sag with those little plastic pillars back in the day because reliability was my main worry. if that riser cable fails during a session you are basically toast. i remember when i was building my first real rig in this old beige tower i found at a garage sale for ten bucks. tbh i was way more worried about the zip ties holding my fans together than the gpu looking pretty. that case had zero airflow and i ended up cutting a massive hole in the side panel with a dremel just to get some air in there. my dad was so mad about the sparks in the garage lol. i actually still have that old dremel somewhere in the basement, probably needs new bits though and the cord is fraying. anyway sorry kinda went off topic there