When I got my uzi during the old assault weapons ban good 32 round mags $30-50 and kind of scarce. Uzi was only $2200 from Vector though.
Same here. I got my full size Vector for $2250 almost 20 years ago. Couldn't believe I was paying that much for a gun. About a month later, Vector ran out and the price jumped $1000. At the time, mags were $35.
German surplus mags and parts flooded the market a few years ago. RTG had a special -- $400 for 50 "rusty" 32-rd mags. My brother and I split it. Only two mags had any rust on them, and that a few spots. Before that, DSA had 25-rd for $8 apiece if you bought at least ten. I prefer 25-rd mags.
If you need uzi mags, they are not going to get any cheaper. I can't tell you how many times I've seen surplus ammo or mags sit around for sale really cheap for months, or even years, and then when it dries up, people come out of the woodwork trying to find it and the price doubles. Don't be one of these people.