There is a small supermarket in Xerte itself, plus many other small shops and bars, plus a small market aswell.
We used to go to a doctor at the medical centre there and never had a problem parking.
On Cami de Mig, the road with the La Caixa Bank, petrol station, and bar /restaurant there is a new Spar.
We do not live in Xerte but have found this Spar very good and well stocked.