If you have very limited money, stick with the meter you have since it is likely working correctly, and probably has adequate performance for you. Save your money for other things, like a good DC power supply, or a used oscilloscope, or a good soldering iron.
Speaking of soldering iron, I am happy with the Weller irons that I have. I have also been very satisfied with Hakko brand irons and hot air tools. I do not like the Metcal irons that I have been forced to use. A good iron is the basic Weller WTCPT although it is nice to have a user-variable tip temperature control such as in the model WES51 or WESD51. There was also a post on these forums last summer about an iron that was only about $50 or so and the user reported that it was quite good. I wish I could remember when that was. I see the model Hakko 936-12 available on Ebay for $90. Seems like good value.