Starting today, Texas will collect sales tax on the fees online marketplaces charge sellers. Buyers already pay sales tax on their purchases. This new levy falls on listing fees, commissions and other platform charges. On eBay, those fees can total 15% or more of the combined sale and shipping costs.

School property taxes provide the biggest line item on the Texas taxpayers’ bill, so it’s understandable why some GOP politicians and property taxpayers want to have something that is more affordable to family budgets.

Texas would have to spend tens of billions of dollars to get rid of the state’s property taxes, state budget officials said Wednesday — a reality check on some conservatives who want to end them once and for all.

The state uses that money for schools, infrastructure, and other projects. To replace the property taxes, the Texas Taxpayers and Researchers Association said the state’s sales tax figure would have to more than double by more than 20%.

Texas Republicans have been trying to reduce the state’s high property taxes for years, but some acknowledge eliminating them would be too expensive.