Micro SaaS acquisitions attract first-time buyers because the prices are accessible and the businesses look simple. Yet the same mistakes appear again and again in failed deals, and most of them are avoidable with slower, more sceptical diligence. The errors below are not exotic; they are ordinary oversights, such as trusting a listing, skipping a technical review, or forgetting that customers need support. Knowing them in advance is the cheapest form of buyer education available.

The most common mistake is treating the listing as verified fact. Listings are marketing documents, written to sell, and they naturally emphasise the best months, the highest revenue, and the easiest operation. First-time buyers often accept the seller's profit figure without rebuilding it from payment records, or accept a growth story without checking monthly figures over a full year. A listing that shows three strong months may hide nine weak ones, and a profit figure that excludes the seller's time, hosting, or tool costs is not the profit you will earn.

The fix is boring but effective: verify everything that matters against a primary source. Revenue against payment processor statements, traffic against analytics access, costs against invoices and bank statements, and customer numbers against the billing system. If a figure cannot be verified, price it as uncertain rather than accepting it at face value. A seller who welcomes verification is usually selling a sound business; a seller who resists it is telling you something important, even if unintentionally.

The second common mistake is buying code without understanding it. First-time buyers, especially non-technical ones, often skip a code review because it feels expensive or intimidating, then discover after purchase that the product is built on outdated tools, has no documentation, depends on a service that is shutting down, or cannot be deployed without the seller's help. A short technical review by an experienced developer, focused on the stack, dependencies, security basics, and deployment process, costs far less than inheriting an unmaintainable product.

Support load is the related blind spot. A product that looks passive may require hours of weekly customer support, bug fixes, and billing questions, and that time comes out of the buyer's week. Ask for support ticket volumes, common issues, and response times, and try the product yourself, including signing up, paying, cancelling, and contacting support. If the seller spends ten hours a week running the business and you have three, the business you are buying is not the business you can operate, and the price should reflect hiring help or the deal should not happen.

Overpaying usually follows from the first two mistakes: unverified revenue and underestimated costs produce an inflated profit figure, which produces an inflated price. First-time buyers also overpay by anchoring on asking prices rather than on comparable sales, or by falling in love with a product and negotiating against themselves. Set a maximum price before negotiations, based on verified profit and a multiple for similar businesses, and be prepared to walk away. There will be other listings; there is only one budget.

Underfunding is the quieter twin of overpaying. Buyers spend everything on the purchase and leave nothing for the months after, when revenue may dip during transition, an unexpected cost appears, or growth requires spending. Keep a reserve beyond the purchase price, enough to cover several months of costs and a buffer for surprises. Finally, do not skip the handover plan. Agree in writing what transfers, how long the seller will help, and how customers will be told, because a messy handover can lose the very customers you paid for. The buyers who avoid these mistakes do not have special insight; they verify, they check the technical reality, they price conservatively, and they plan the transition before they pay.