Pretty good, just got a Seagate external 2tb USB 3.0 drive for 90 from BestBuy eBay with in store pickup, needed more room for my HDTV captures.
Got the pickup notice 30 minutes after I did the buy and drove out to my old neighborhood store to pick it up. Used PayPal money I made doing online surveys so no real money outa pocket and I still have like 50 bucks in there plus building up more pay from surveys every week
Most of the better drives have fast desktop SATA drives in them and sometimes are cheaper then the OEM ones so folks pull out the drives to use internally. I have another Seagate 2tb in here that I did that with and it is a fast 7200 rpm one but close to full now.