I have one that I have no use for; however, my unit has the "ucurrent" murphy where its got the wrong op-amp installed which might give you noise on your measurement.
Annoyingly, I've contacted dave to try to get a remedy (maybe even just ship me the correct chip) but he ignored my email, as he did a lot of other people (check the Youtube comments).
I'll sell you the unused unit at a discount, say 40 euro plus shipping, because you might need to buy and replace the opamp. Alternatively, if anyone can point out a cheap low-quantity source of the op-amp or just post me one I'll fix it for you before shipping it out!