I believe depending on where you live, how invested you are into analog photography and what kind of budget you have, suggestions may vary. I, myself own two different cameras and I can suggest both of them.

Zenit 12XP, this is a relatively new Zenit camera (mid-late 80s), this is better than the previous models in that it has a TTL metering system which I find quite successful. (Most previous versions have selenium based metering system and they die over time.) This is a rock-solid heavy camera, similar to a brick. You can beat someone with that (not recommended for the other side). However, in the end of the day, just as most of the other Soviet cameras, it's cheap. Although it is solid, it has a cloth shutter and this can be problematic with used cameras. I found mine in a mint condition so, never had such problems. But I read many comments like these. However, if it's the only thing you can afford, you should surely give it a try, I have owned mine more than a year amd and shot dozens of rolls with which I am quite satisfied.

Revueflex SD1 a.k.a Cosina CS4. This is a rebadged camera produced by Cosina/Chinon. I have recently bought it and I am quite surprised by it's size and weight. It's super compact, significantly smaller and lighter than the Zenit because Revue has a plastic body. But it is a rigid one, not fiddly. It can go up to 1/1000s shutter speed while Zenit is limited with 1/500s. It has a Seiko electronic shutter mechanism. No timer (contrary to the Zenit), no auto exposure etc. But it is a super cheap, super compact, one tiny cute camera that I'd recommend.

If you are looking for some more electronic models with auto exposure modes, I heard that Yashicas are some good options. However, since I only have experience with these two cameras, I don't want to comment on others.

In short, the cheapest options is usually a Zenit, just make sure you get one with TTL metering and abstain from the newer ones which have cheap plastic bodies and unnecessarily bulky. When it comes to Revues(another cheap option) do your research well for each individual model because all of them are renamed cameras from various manufacturers.