Calculators you regret buying?

[Steve Simpkin]

That's an odd concept. Why would I ever regret buying a calculator

The only one I can recall regretting was a used HP-38G I bought for my daughter for use in High School. While the keys felt ok, the build quality of the one I bought was terrible. The battery compartment was so tight, I could barely insert the batteries. The way the battery contacts pressed against the PCB pads was very unreliable so it often did not turn on unless you twisted the case. Altogether it made a very poor impression for an HP made in 1995 (S/N 3529S12829).