HP Prime Rev A - worth buying?

[Roger Ward]

There's variable pricing on the HP Primes - I'm assuming the lower prices are for older models, it's very hard to tell from ebay adverts. So, if I'm not going to use the wireless capabilities of Rev C, is it worth buying the Rev A models?
I'm not any sort of power user, just want to play around and see how it compares to my trusty HP48.
Any thoughts most welcome.