How about upgrading TI73 and TI73 Explorer thin shell to TI83 Plus $15.
I do only hardware repairs , I can repair all models of TI calculators.
TI 84 Plus and TI 84 Plus silver edition have 3 different type of LCD I can repair 2 types of broken with broken LCD $35.
TI 83 Plus have 4 different type of LCD I can repair 2 types of broken LCD $25.
TI 84 Plus CE broken LCD $45.
TI Nspire CX and TI Nspire CX CAS broken LCD $45.