cheap handheld oscilloscope ?

[KING]

I need record the data(the values of data, not the waveform) for a long time,usually 3or4 hours,but mostly handheld oscilloscope have not this function.
I know fluke's handheld oscilloscope is good choice,but it's too expensive for me.
I need a cheap handheld oscilloscope,who can give me suggestions?

 

[GibsonEssGee]

http://www.hps140.com/ is the cheapest I could find. Don't know if the specs are up to what you need.