Cisco IP phones and licensing

Hey guys,
I'm just now getting into learning about Cisco VoIP and I'm in the process of building my lab. I'm looking at getting some IP phones off of ebay but I've been burned before by buying a phone (7905) that didn't come with a license.
How exactly does licensing work with Cisco CME?
Is it possible to buy phones that come with licenses? Do I even need licenses if I'm just setting up a voice lab?
What phone would give me the best bang for my buck with CME 3.3? (Cisco 3640 router)
Should I be looking at SIP or SCCP phones?
Thanks!
I'm just now getting into learning about Cisco VoIP and I'm in the process of building my lab. I'm looking at getting some IP phones off of ebay but I've been burned before by buying a phone (7905) that didn't come with a license.
How exactly does licensing work with Cisco CME?
Is it possible to buy phones that come with licenses? Do I even need licenses if I'm just setting up a voice lab?
What phone would give me the best bang for my buck with CME 3.3? (Cisco 3640 router)
Should I be looking at SIP or SCCP phones?
Thanks!
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Comments
Also don't buy the phones if they have been converted to use sip. The ccna voice test much more on sccp