Online used-vehicle retailer Shift Technologies Inc. said Thursday its board of directors is working with management and financial and legal advisers to assess a range of “strategic alternatives” for the company. in a statementShift said its board of directors was conducting a process to “explore and evaluate strategic alternatives, including exploring a potential sale of certain operating businesses, third party investment or partnership opportunities and/or funding alternatives for our marketplace business, to further enhance value for all stakeholders.” The company said its board did not set a timetable for the completion of the review process. There is “no assurance” it…