For under $30, check out Radio Shack, or if you are near Fry's or another superdooperElectronics Store... check there too. RS isn't bad for the money... esp. if you find a better model on sale that day. Granted... in a class at school, me and a team of classmates designed and built a meter that was on par with, if not better that the "reference" RS meter

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If can dish it out... Fluke is considered near the cream of the crop... but there are many that will work just fine for someone like yourself who will probably (just guessing here) hobbyist projects.
Look for something that does Resistance, Capacitance, Diode Check, Continuity (beep), Voltage, Current, and one that measure Transistor characteristics can be useful but not necessary. Some also will measure TEMP.
Your meter MUST have (IMHO): Voltage (AC and DC), Current, and Resistance check at the minimum. Capacitance is very useful too.