This goes out to product creators and WSO posters - it's a quick tip that I've been experimenting myself successfully to add value and raise prices of my products. Here it is:
The trick is to offer an "Unlimited, One-On-One Email Coaching Bonus" to whatever you're selling. By doing this, you instantly transform your product from just an ebook or screencast to a training program of sorts, and significantly increase the value of your product, and thus the amount of sales and the price you can charge for it!
That said, this is really an "empty bonus" in a sense that it doesn't require you to do any additional work - this bonus is simply a promise to answer any questions people have. But even if you don't mention this bonus, you still have to answer your buyers' questions anyways if you want to keep a happy customer base. Yet by simply wording it explicitly in such a nice way, it works wonders to get people to buy! It builds urgency - since any "coaching program" can naturally only take a limited number of students, and that means more people will buy just so that they don't miss out!
For my last WSO, I've had someone who bought twice just to extend the coaching period, and LOTS of people who anxiously send forum messages to inquire if the coaching bonus is still available. So I know how effective this can be.
Now, if you are concerned that by doing this you'd be stuck in front of your computer all day answering coaching emails - no worries. Most of your buyers won't ever take advantage of it (because they won't put your product to action), and the questions you get are generally very simple to address. My last WSO sold over 200 copies with this bonus attached, and I get roughly 5-10 emails a week, which is only slightly higher than the support I do regularly before I introduced this bonus.
Just thought that this might help If you have products of your own and don't mind spending a little more time answering emails, then give this a try!
EDIT: I just needed to clarify that when I offer the coaching bonus, I state clearly the extent of the coaching, which is that "I will make myself available to answer any questions and concerns you may have regarding the system, and provide critiques on your niche/products selections, site design, outsourcing procedures, or just about anything else you need to succeed with my system" (quoted directly from my last WSO). I don't offer customized, proactive coaching, which is over-the-top and not scalable. But from experience and customer feedback I found that people still appreciate the value, probably because they would otherwise not expect a high level of customer service unless you spell it out clearly for them.
I also put a time limit on the coaching, to limit my own time commitment. But so far I've found that I still get the regular amount of support emails, despite increased conversion from offering this bonus.