Does something like this already exist and if not, why not?

Check out https://www.balancedpayments.com/ They are made for marketplaces. Airbnb CEO among others invested in them and they have some of the best pricing/payout fees. Also some good info on http://www.collaborativeconsumption.com/2013/10/08/online-marketplaces-are-hard/ One of Balanced Payments co-founders is writing this blog series on marketplaces.

There is quite a bit of information available online about eCommerce conversions rates. According to a ton of sources, average visitor-to-sale conversion rates vary from 1-3%. This does not mean the Furniture conversions will be the same. The bigger problem is that visitor-to-sale conversions are not a good data point to use to measure or tune your eCommerce business. All business have some unique friction factors that will affect your final conversion rate. It's very important to understand each of these factors and how to overcome them. The best way to measure and optimize is to take a conversion funnel approach. Once you have defined your funnel you can optimize each conversion rate to better the total effect. For example: Top of the funnel: - All web site visitors, 100,000 / month First conversion: View a product page, 50% of all visitors Second Conversion: Add to Cart, 10% of people who view products Final Conversion: Complete Checkout, 80% of people who put items in a cart In this example we see that only 10% of people who actually view products put them in to a cart, but 80% of those people purchase. If you can figure out why visitors are not adding items to their cart and fix the issue to increase the conversion rate, revenue should increase significantly because of the high checkout rate. You can use free tools like Google Analytics to give you a wealth of information about your site visitor and their behavior or there are some great paid tools as well.

I always suggest going "uncomfortably narrow" initially so that you can really dial in the user experience and build liquidity first. Going broad will be tougher as there's too much noise to signal. Also, it's best to fake the supply side initially of you can to improve the buyers side first, then figure out supply & quality afterwards if customers are buying and you've proven out a demand strategy that will work.

Hone decor / furniture industry is one of the highest profit promising industry today. The profit margins on home decor ranges from 20% - 45% depend on the price of the product. If you're looking to get quickly popular, I suggest you start with the online store and promote it on offline as well. Keep the margins low initially so that you can attract more buyers. As the business grows, reinvest the amount back on the business so that you can stock more varieties. All the very best.

TAX is US. For export paperwork (free tax delivery) is India. Use business location may in delaware for lower state tax