If I'm reading resumes to interview and I see Training the Street or something similar listed, I will strongly discount the candidate. Why? It shows a lack of priority and judgement - why pay hundreds of dollars for something you'll learn as soon as you start? If you need help for interviews, you can read the Vault/M&I/WSO guide for $30 and be set without the huge cost. It also brands you as a less interesting person - it implies that while others are playing sports or working to pay for college or having fun, you're shelling out hundreds of bucks to learn to do a DCF.
That's just my two cents, what are your thoughts on taking those courses to put on a resume?