I had a colleague in work come to me with exactly this, they'd got AI to spec them a PC for their kid to fit a certain budget.

The problem is the AI was using pricing data that was about a year out of date. It also massively over-specced (calling for 64GB of RAM for Roblox!).

The funny part was even when he challenged it back saying he couldn't find that RAM for anywhere near the price GPT quoted, the AI just argued back saying whatever store it was must be trying to scam him because RAM shouldn't be that expensive.