Are there any open-source marketplaces available for building websites?

I like to separate your question into 2 sub-questions: #1 How do we determine which side to charge? #2 How much is the right amount to charge? On #1, my answer is that you can charge the side(s) for whom you add the most value. In your examples, Uber really solves a big problem for drivers, it's that they sit idle for a good part of the day, so are willing to pay a lot for new leads. (their alternative is no work) Consumers are charged more for the convenience of a private car but they are probably not so much willing to pay more for a taxi, even if they can hail one from their phones. For AirBnB, it's a mix, it's a way for landlords to monetize idle capacity which they are willing to pay for, but it's also a way for a renter to pay less than they would normally pay for a hotel. On #2 (how much), I like to triangulate a number of factors: - What's the maximum amount I can charge one side, while still being a good deal for them. - How much do I need to charge so that I can become profitable? (the economics are quite different if you charge 3% vs. 12%) - What are comparable services charging for substitutes/competitive offerings? I will just add that there is no formulaic way to determine pricing strategies (curated vs. open), and it's a lot more about what's the comparable and what the value delivered is. That's how I approached the question while deciding the business model at ProBueno.com (my startup)

Focus on the more difficult side of the marketplace. For instance, if you think it'll be easier to get suppliers, then focus first on getting buyers - always be working on your toughest problem (aka your biggest risk). You'll find some great blogging on Marketplace and Platform topics here http://platformed.info (read the ebook too!)

We have been collecting usage data on the home button from about 750 websites we manage across North America in an effort to try to determine if it is necessary or not. While each website is different, and much of the data is statistically insignificant, we have started to operate with a few assumptions. 1.) Most users, particularly younger users, recognize the logo as a way to get to the home page. 2.) Websites without home buttons seem to get a comparable amount of traffic to the home page as those that do not. We don't see a significant difference between having a home button or not. 3.) Websites without a home button often will see an increase in direct traffic from returning users during a session indicating that users who do not know the logo is a route to the home page will instead clear the address bar back to the root domain to get back home. Based on our research, we have decided to omit the home button in most instances. Although when it is present, it is often used, most users seem to understand how to get to the home page regardless of the inclusion of a home button. With the complexity of modern websites, we are usually pressed for space in the header and can better use the real estate that would be dedicated to the home button for other UI elements. That said, if the audience for our website skews older, we will still include the home button. Our research has indicated older users are less familiar with the concept of the logo being a home button.

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.

Take the # of hours it takes you to do it and charge $50/hour. That's the price. Eventually you can charge $100/hour but that will require a bigger customer. If the customer is small < $1M in gross sales per year - charge $50/hour If the customer id medium < $1-5M / sales - charge $75 Over $5M - charge $100 The challenge you'll face is clearly defining the expectations and handoff so that you're not stuck doing stuff that you can charge for and always getting interrupted from past customers.