Developer Builds AI Car Pricing Tool for Nigeria After LLMs Quoted Outdated Naira Rates

A developer building AutoValue, an AI-based used car valuation platform for Nigeria, discovered that large language models were consistently mispricing vehicles because their training data reflected the naira at ₦450 to the dollar, while the current rate is around ₦1,500. Since nearly all used cars in Nigeria are imports priced in dollars, the currency collapse meant LLM-generated valuations were roughly three times too low, regardless of the car's actual market value. The problem could not be resolved through prompt engineering alone, as the outdated pricing data was deeply embedded in the model's training. The developer redesigned the system so that live web search results from Nigerian listing sites establish a mandatory base price anchor before the LLM is involved. The model's role was then narrowed to applying condition and mileage adjustments on top of that real-time anchor, rather than generating prices from its own knowledge.