The French entrepreneurs’ fund, ISAI, has just announced that its investing in Commerce Guys, a Franco-American company that develops open source Drupal e-commerce solutions. This is the third investment for the fund run by some 70 French entrepreneurs from these companies, which previously invested in carpooling platform Covoiturage and the high-class online marketplace, InstantLuxe. And while the transaction amount has not been disclosed, I’ll venture a wild guess that it most likely lies between the €500,000 and €1.5 million range – which would be in-line with the rest of ISAI’s investments.