There are alot of good caresheets out there, best way to find them is to check the bearded dragon sponsors on this website and other areas of www.kingsnake.com. Reading a few pages worth of back posts on this form will also yield alot of interesting details. You can also just do a search for bearded dragon care sheets on google.com or other search engines. Buying a couple books on bearded dragons is also another way to learn more about them.
Far as I am concerned there is never such a thing as reading too much about bearded dragons or other reptiles. You will encounter contriditions in care but keep in mind that some sources may be quite old and never updated to knew care methods. Also, some people have different methods to care for their dragons which work well. Some feed crickets, some feed roaches, some feed a mixture of insects etc. Others feed exclusively pellets or pellets mixed with greens etc. You just have to use what works best for you.
On sites where you find dragon care sheets will also contain different dragon morphs (not all will but some do). Bearded dragons in the wild occure in grey/browns and a sunfire phase, which si more reddish/yellow. Many of the red/yellow color morphs come from breeding the naturally occuring reds/yellows, from the way I understand it. The harder to make color morph will of course cost more.
Prices could range anywhere from $25 to $700 for a baby bearded dragon bought directly from breeders or at a reptile show. Your area as well could affect the price of bearded dragons, especially the nice color morphs. Normal colored bearded dragons will be alot cheaper than the high color baby dragons. However, do keep in mind that what color a dragon looks as a baby doesn't indicate what they will look like when adult. Seeing the parents and grandparents of your baby dragon or older siblings (from earlier cluthes) will give a better ideal with they will color up nicely later on or lose their color.
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PHLdyPayne