hp12c / hp12c platinum; which to buy

[kkapkin]

Personally I recommend 12c platinum.
I purchased several 12c's for office use and returned them back to the stores every single time for an exchange until stores (Fry's, Stables, Office Depot) literally ran out of units. Problems have always been the keys, several keys did not registered consistently when pushed. Very bad keyboard. Therefore I don't recommend the 12c. However I never had any keyboard issues with multiple 12C platinum units I purchased, works consistent and every time. For clarification 12c Planium is an RPN calculator, also you have the option to use is in Algebraic mode which I never use.