HI, Please fill out your state and country location, this will help us figure out what store to send you to.
If you're in the USA, there is a store called Harbor Freight which has lots of good tools for low prices. I bought a portable suction base vise there for $15 and it's the best thing ever!
Here's my video of it holding a 4 pound military padlock with out any issues: http://www.youtube.com/watch?v=9Xg9ZOIehiU
Here's the website where you can buy it or go find a store near you (looks like price has gone up a dollar or two:http://www.harborfreight.com/2-3-4-quar ... -3311.html
If you prefer the all metal old timey style that you have to attach to a table, here's one at Home Depot for $21
hope this helps, welcome to locksport!