Moving up is a harder transaction than a first purchase, because you are running two deals at once. Sell first and you may be renting on the wrong side of a rising market; buy first and you are carrying two payments until your current home closes. The sequencing decision usually matters more to the outcome than the price you negotiate on either side.
These guides walk through that sequencing, the neighborhoods Tucson move-up buyers most often trade into, and the specific triggers — schools, square footage, a second home office, single-level living — that tend to start the search.
If you are weighing a move and want to know what your current home would realistically bring today, a conversation is usually faster than more reading.