If it's applicable, you may want to setup a few adwords campaign and see which product sells. Put a buy now button and see how many people are willing to spend

If it's applicable, you may want to setup a few adwords campaign and see which product sells. Put a buy now button and see how many people are willing to spend their money. Of course on the buy now page you show a message telling them that the product is currently unavailable, and you can ask for their data if you want. Don't simply ask people around if they would be interested in your product tough, because one thing is saying you would, another is to actually show the money.