SP-AKI without my mod already uses a snapshot of real prices, and there are other mods, like butter that do the same. I'm sorry I had to limit the mod to paid API keys only, but unfortunately, the mod was completely unplayable before, since everybody was using my API key for free, and everyone kept hitting the request limit.
If I knew any free alternatives to getting real life price data, I'd use that, but for now, tarkov-market is the only reliable one that I've found.