http://ninjito.com/libnfc2.zip
]]>But I do like the proxmark for its versatility.
]]>I think if you're just looking to crack, a PM3 might be slighlty overkill - but that's just my opinion
I agree. IF you are looking at cracking MIFARE Classic only, you already have the minimum amount of hardware required.
What do you want to do with the PM3 / ACR-122U?
If you are concerned about purchasing a defective/dodgy PM3, then I'd suggest buying from here: http://proxmark3.com/
All of the developers here (to my knowledge) give of their own free time and resources. No one is paid to work on the PM3. Some contributors have been paid (/sent items) by other forum members to thank them for their hard work.
You do not need to worry about out of date firmware. The PM3 is an ongoing project and you are likely going to want to upgrade the PM3 a number of times after you receive it.
The biggest problem with the PM3 IMO is that the design is getting old. Some parts will get difficult to source in the future. Before then, a redesign should be considered.
Depending on what you're after, this shouldn't put you off getting the PM3.
If the community agreed on committing to a re-design, we could consider financial incentives.
]]>I think if you're just looking to crack, a PM3 might be slighlty overkill - but that's just my opinion
]]>