I use free42 on my phone, have been tempted to get DM42 for ages, but not sure I can justify it. It'd be nice to have a little 4 function RPN calculator for my

I use free42 on my phone, have been tempted to get DM42 for ages, but not sure I can justify it. It'd be nice to have a little 4 function RPN calculator for my desk that is cheap enough for me to allow it to stay there.