Once you’ve determined that the prospect is ready to buy, you can begin to suggest solutions to their problems. Do this gently, and don’t over-emphasize your product, just its benefits in the context of what the prospect said earlier.
Not to mention, you shouldn’t force the sale via cold email either. It might be tempting for you to link to a product landing page, but those usually don’t look so good in the beginning. After all, you might not have the funds to make the design perfect. And with little to no clients, you won’t have any reliable testimonials either.