choosing scales

so I haven't got any proper weighing scales and so I'm just looking up good reasonably priced ones at the moment. I have it narrowed down to two. one is a scales and body fat analyzer which I'm not too fussed about as I don't know how accurate the fat analyzer can be by just my feet and the other a regular set of electronic scales.

question is which ever one I buy eve to storage space at my current home they would be moved from under the bed when not in use to the bathroom to weigh. I've read that this can make the scales give bad readings if so how much does it effect it and if so even more does it effect it so much that if I'm having to move them (and yes I do have to move them) is there any point in getting any.