The BBC has made thousands of their archival sounds available for personal and educational use. It is a fantastic resource for high-quality, historic foley. 3 Tips for High-Quality Audio Searching
Before you hit that download button, always check the license. Download Sound effect mp3
Look for MP3s with a bitrate of at least 192kbps (320kbps is ideal). Anything lower might sound "crunchy" or muffled. The BBC has made thousands of their archival