-
You can get something good for 200-300 second hand - I use one of these.
Beware there's similar models that go for half that - but for a reason (slower, worse image quality, no software included etc.)Another option is to "scan" negatives with a digital camera.
You'd need a small but good light table, some sort of tripod for the camera - which should have macro capabilities and as high a resolution as possible.
If I already had a digital camera that offers this I'd probably go that route instead of buying a scanner.Both options should allow you to make proper 20x30cm prints from your 35mm negs (assuming this is what you have) at the end of the day.
Honestly, I probably wouldn't bother with something sub 200, rather try and find a place that does dev & scan for an ok price and have them do it.
At that price range scan quality is mediocre at the very best and it's still very very time consuming / a faff.