Nico De Pasquale Photography via Getty Images Average prices online rose 0.8% year-over-year in September, according to Signifyd. Key Takeaways Online prices rose year-over-year in September for the first time in about two year, according to Signifyd, a fraud prevention specialist that analyzed price changes for some 60,000 products. Tariffs and businesses' rising costs are likely contributing to inflation in the e-commerce system. If scouring the internet for deals is part of your budgeting routine ...