Most underrated programmables

[BarryMead]

While the WP-34S isn't exactly a retail item, I think it deserves a mention under this topic.

I bought my HP-30B for 17.00 and the overlay for $5.00. The crystal and caps add perhaps another $2.00.
So if you don't mind investing a little time, you can have a superior RPN programmable scientific calculator for less than $25.00!

On a features per dollar basis, I would think the WP-34S is way up there if not in the number one position.