It all boils down to what you're planning to do and what your expectations are (and whether they're realistic).
Your website isn't up yet, and the question you should ask yourself is: are you expecting to receive traffic from Google? Getting customers to find your website through some search engine?
If the answer is yes, then don't start with an inventory of 6,000 thin pages. It won't work. Been there, done that.
A strong domain would probably be able to rank, regardless of thin content. However, if you're starting a new business, don't let Google decide your website is low quality. Start slowly, add your own content and do SEO wisely. Don't regret wrong decisions. Adding content takes time. A lot of it, so plan ahead, and focus on things that you can actually sell.
Take advantage of paid advertising, combined with your SEO efforts, unless you're ready to wait for your first sale.
By the way, Google is pretty smart at detecting automated content, ie "We have the best [product name] at the lowest prices". So that approach is certainly not going to work.