Wellbutrin XL Prices. This Wellbutrin XL price guide is based on using the Drugs.com discount card which is accepted at most U.S. pharmacies. The cost for Wellbutrin XL oral tablet, extended release (150 mg/24 hours) is around $272 for a supply of 15 tablets, depending on the pharmacy you visit. Prices are for cash paying customers only and are not valid with insurance plans. A generic version of Wellbutrin XL is available, see bupropion prices.