You can click on the Link to see the prices of all spare parts of Hyundai Xcent. Moreover, for the exact prices, we'd suggest you walk into the nearest authorized service centre as they will be the better person to assist you. You can click on the following link to see the details of the nearest service centre and selecting your city accordingly - Service centre
It would be unfair to give a verdict here as the resale value of any vehicle would depend on certain factors such as the physical condition, kilometers driven, number of owners, engine's health, etc. Moreover, you may click on the following link and fill in the required details in order to check out an estimated value of your car: Valuation of Used Cars
For this, we would suggest you walk into the nearest dealership as they will be the better people to assist you. You can click on the following link to see the details of the nearest dealership and selecting your city accordingly - Car Showrooms.