Go to KEH.com and shop. They have a huge selection of used equipment that fit your needs. If you are only interested in 35mm and don't want to stay with Minolta, my advice is to go with a Nikon F or F2. They were built better than any subsequent Nikons and the selection of manual focus Nikkor lenses is astounding.
If you think you might be interested in medium format, there are huge bargains in nearly every brand. If your main interest is landscape photography, medium format may be something to look at.