Look at kitchen scales- the kind people get when they have dietary issues. They are very accurate and pretty cheap. I have a Starfrit one that I really like and I think it was all of $20-30.
Def
Much as it pains me to say it, he's right
mine is just a cheapo from the supermaket (though not pocketable) and cost about £8 ($12)
Oh, if only I had more room in my signature line for more quotes....

Here's the scale I have:

It's easy to use and has other uses as well- like weighing food portions, not that I have ever done that... obviously....

I also have one of these:

I purchased it from the local purveyor of rock'n'roll merchandise at the local flea market and I'm pretty certain it's the only one that he has ever sold that was not pressed into service in the freelance pharmaceutical or botanical industries.
Dave's not here man....

Def