Shift has added a third market in Texas where consumers can sell their cars to the used-car ecommerce company.

Joining Austin and San Antonio as consumer car-selling service markets is Fort Worth.

"Fort Worth is a major thoroughfare in the state, and a huge opportunity for Shift to continue to expand in the Texas geography," Shift co-CEO Toby Russell said in a news release. "We're thrilled to be taking this next step and bring our service to more and more consumers across the state." 

Consumers can go to Shift.com to get an instant estimate for their car. If the customer then wants to proceed in getting an evaluation, he or she can book an appointment to have a Shift Concierge come out to evaluate the car and make an offer.

If the offer is accepted, the transaction is completed at that time on an iPad, with payment to the customer arriving digitally within days, Shift said.