I paid $40 dollars for mine at walmart
but really found that I hate the mouse, it uses a lot of batteries, the first week I had it, I replaced the batteries 4 times in it, as for the best, I am not sure, silly me did not research them :/ I do know this, if you do decide on one, go with a rechargable one, cost more, but cheaper in the long run [img]smile.gif[/img] as for the ranges, the more the number, the further away from the source you can have them, mine is a short range so it has to be right there, can not be taken away from the desk