Just look for a used, but good quality, drill vice! If you can afford it, get a small one and a large one! I know Americans like to buy American made, but British and German vices are good quality too!
Most of the time, you will be able to clamp your workpiece in the vice and position it by hand. If you need to clamp it down, don't bother getting a clamping set, just get a couple of clamps and hold down bolts from a firm such as Wixroyd..
You could certainly get all you need for that money in the U.K. and I'd be surprised if the U.S. is more costly!
Avoid cheapo / Chinese vices as you would the pox! I've used a couple and they can be frustrating as hell! Even if you think you have a good one, you will position, say, a round workpiece carefully, then find it rotates as you tighten the vice because one jaw lifts!
If you can afford it, get a v block for drilling round stuff, and a magnetic v block is a godsend if you can find one used!
If you do any repititive work, try to get hold of a quick release vice. They are often not that costly and well worth it!
If you struggle to get a used vice, firms such as MSC offer 'mid range' drill vices at reasonable prices!