That makes it pretty likely you’d be able to find one for sale with some searching, but some particular model years and features might be trickier to track down than others.
The Celica model took on plenty of iterations over its lifespan, with many cosmetic changes being made from year to year—a lot of them hardly seem like they could be associated with the same model! The original 1970 Celica was a two-door hardtop coupe. Shortly after, the Liftback form was introduced. Then, convertible options were introduced during the third generation. In all the Celica ended up spanning a whopping seven generations.
Ultimately, declining demand for sports cars was a major factor in discontinuing the Celica after 2006.