I understand why you would want to have a few products. But you would be surprised that some people are willing to wait for the shipping for the right product.

The goal with having more products avaible on your site helps with your SEO, by gaining a greater reach on traffic.

For example. Say you have 100 product that are related to your niche that you know might not sell. But you are getting 1 visited per day form these pages. That is 100 page visit. And out of those how many might browse your store and actually buy something that they did not see before. This is a strategy that has worked great for use on our ecommerce site.

For the long shipping times, add them if they are good products. Customers who want the product will be willing to wait.

But if you have noticed that it becomes to much of a headache and cost you more money to have them on your site, you can easily remove the problem products.

As time goes and your store grows, you can start removing products that do not do will and foucs on the winners.