While that old adage of, 'you get what you pay for' come to mind, I feel the need to ask the experts.
I want to get an Ethernet shield for my Arduino, but don't have the 30 dollars to buy a proper Arduino brand one. So the next course of action is to look at ebay knock offs. Usually I am fairly good at deciding which ones are worth while, and which ones aren't, but in all honesty, I know very little about Ethernet. I am hoping some pople could give me opinions on how these look, and some issues I may need to consider if I were to buy any of them.
This seems to be a bottom of the barrel option: http://www.ebay.com/itm/Arduino-Ethernet-Shield-Wiznet-W5100-/121182816716?pt=LH_DefaultDomain_0&hash=item1c370f09cc
This one seems to be a bit of a step up: http://www.ebay.com/itm/Ethernet-Shield-W5100-for-Arduino-UNO-MEGA-2560-1280-LEONARDO-/251323000194?pt=LH_DefaultDomain_0&hash=item3a8404a582
This one looks similar to the previous one, but I am not entirely sure: http://www.ebay.com/itm/Ethernet-Shield-W5100-For-Arduino-2009-Uno-Mega-1280-and-Mega-2560-/300916075105?pt=LH_DefaultDomain_0&hash=item460ffeea61
Any opinion on any of these would be greatly appreciated.