First, you do understand there are northern and basin Emeralds?
Northerns are usually at the lower end of the $ scale with WC animals going for $175-350 depending on amount of white markings they have. You can find captive born babies from around $350 , but you need to make sure they are captive BRED and born, not farm bred and then shipped into this country. Ask for pics of the parents, breeding pics, birth date, husbandry records to make sure you are getting a true captive bred and born. Farm bred babies can do well, but also have been known to have problems getting established. As far as long term captive (LTC) wild caughts, we and many other veteran ETB keepers don't consider anything that has not been in this country for at LEAST 18 months with no problems to be a LTC. However, lots of dealers think 2-3 months means LTC. Buying a WC animal, even one listed as LTC, is a major buyer beware situation. Obviously, the price will be more on a TRUE LTC WC because the person selling that animal has taken care of it for a long period of time.
Basins are at the higher end of the scale, starting at just below $1000 and going up, up, up. Basins are generally more mellow and just a tiny, tiny bit more forgiving of husbandry mistakes than northerns. You will probably only see basin babies, older captive born, or LTC basins advertised. Again, all the same pricing considerations as above determine the asking price, markings (crossbars, stripe, diamonds, and laterals), age, amount of time they have been in country.
Hope this helped a bit more.
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Karen Clark
Gems of the Rainforest