Of course if you just want to play with it till you think there is a good buy you can get a couple of ASICminer USBs from the group buy page for .18 bitcoins each. Please do not think you will get your investment back but you can play with them and use the different miner software. I have 15 in one pool I can around .0235 bitcoins a day in another I cam Make .00035 bitcoin a day and the pool I am in now I make .0375 bitcoin per day. 

Was not my question but have been looking for the answer, thanks for the explanation and the questions

Ya broke it down to 2 rosewell powered hubs and just used 5 per hub found one that did not always get recognized by the miner software and had way more hardware errors than the other when it did get recognized as a side note the rosewell 10 port USB hub works better when you just use 5 same with the 7 port hub. Any way the eBay seller is going change it out for me.
So in a week I will post how the 15 work I will have another hub by then and a new USB miner by then. Thanks for all ideas.

I have a good fan cooling them they all feel warm but not hot, I will try each USB in the first USB hub I bought as I know it works and post results later to day. Thanks for the help so far

Okay so I know I will be lucky to ever break even but the best way to start is to jump in. I am using BFG miner I had 5 USB miners working just fine I got 10 more in the mail this morning. It looks like the new rosewill 10port hub only handles 7 well and I may take that down to 5 to see if the error rate goes down. The thing that I am having a hard time with is that BFGMiner only see 14 of the miners not 15 but the light blinks on all the USB's and I do not know why any ideas here. Thanks for your help I have been reading through the old post and it is nice to know what all he letters mean in BFGMiner.

Update the hash rate would seem to indicate that only 14 are hashing  4,600M/ps this an average have seen it jump to 5 G but not stay there

I am posting here because it seems like the best place for my question. Okay so I know I will be lucky to ever break even but the best way to start is to jump in. I am using BFG miner I had 5 USB miners working just fine I got 10 more in the mail this morning. It looks like the new rosewill 10port hub only handles 7 well and I may take that down to 5 to see if the error rate goes down. The thing that I am having a hard time with is that BFGMiner only see 14 of the miners not 15 but the light blinks on all the USB's and I do not know why any ideas here. Thanks for your help I have been reading through the old post and it is nice to know what all he letters mean in BFGMiner.