Ending today, Udemy offers Investing in Stocks: The Complete Course for $10. (You may need to apply coupon code "G1UA202" to see this price.) That's tied with our mention from a week ago, $190 off, and the lowest price we could find. This course teaches you the basics of investing in the stock market with stocks, mutual funds, and ETFs. It includes lifetime access to 10 hours of on-demand video.