We just sold our 8-person marketing agency and initially thought the same way. Started with Google Drive but quickly ran into problems - buyers asking for access, tracking who saw what, and keeping everything organized. Switched to virtual data room solutions about halfway through and wish we'd done it from the start. Nothing complicated - just a secure place for all documents with better controls than regular cloud storage. The biggest advantage was seeing which documents potential buyers spent time reviewing - gave us insights into their interests before meetings. Cost was around $150/month for 3 months, which felt reasonable given the overall sale price. For small businesses, you don't need all the fancy features, just the basic security and organization tools