flash drives

Ok so how much does a flash drive cost now? My stepdaughter sold me her computer and now I need to buy one. I also need to break down and get faster internet at home. I must confess I am still using dial up and it is painfully slow. I also installed a DTV converter this past weekend. It does give me a better picture but I can't seem to get PBS on it. Which sucks. Everyone told me about these cool extra subchannels and I can't even get PBS. This is such a conspiracy on the part of the cable companies!