Not looking to spend a lot...any suggestions?
What are you riding and hows your position? What clothing are you wearing for riding/commuting and what's your budget?
I party ask because the vast majority of overtrousers/waterproofs are made for standing/walking/hiking upright type posistions and not for the general cycling position. That's one of the reasons why buying cycling specific kit can help massively, but again that depends on how you're riding and what your budget is as it's generally twice the price or more...
I'm always in cycling kit, even with my 2.4 mile ~8 minute commute.
I own various packables but for real rain riding you're best with a proper jacket. For jackets I'd always buy cycling specific. I own/have owned Altura Nevis, DHB Commuter, DHB EQ2.5 and now a Proviz 360. Dropped tails, vents, raised collars, multiple layers and fasteners around wrists make a huge difference to wet riding and are worth paying extra for. As you're generally spending more for cycling specific you then need something that's multi-season to justify it a little so I've found it is generally best just an outside layer to keep the elements out, then you can layer under it depending on temperatures. You also need some breath-ability / various vent options. Especially commuting as you generally have 2 rides in different conditions most days.
After using general 'cheap' overtrousers and either wrecking them (ripped/caught in chain etc), or getting fed up of the flapping, I previously got DHB Mono Overtrousers. The fit was better, being able to tape in the legs was great although the velcro not that well positioned. Waistband wasn't great, I ended up using suspenders with them to hold them up. The fit on my thighs was a little too tight, they eventually tore/came apart on the inner leg. I've still worn them for the really heavy rain 4-5 times since but last time more of the leg came away so it was time to replace them. I ordered some Altura Nevis III after originally wanting the 'Pro' but being unable to justify the cost, then looked at the Cyclone and Nightvision. But when it came to ordering some the best place to buy them was the Altura website where the Nevis III where the only ones in my size,
but several sales on there at the moment so worth a look if £30 is within your budget...
I've not worn them yet so can't comment (only arrived today). I wouldn't really spend more on waterproof overtrousers as I only generally wear them in the heavy rain. I own various leg/knee warmers with water protection (Castelli Imprevisto & Sportful NoRain) so for showers I don't bother with legs, only when there's heavy rain.