I think they get around 9 feet. Still a lot of snake. Just not quite as much as a normal retic. As far as price goes that varies quite a bit but I would imagine somewhere in the neighborhood of $300-$400.
sorry, but there are a variety of dwarf reticulateds out there and it all depends on the locale for average adult size and price. The jampeas are the largest of the dwarfs, and they can get anywhere from 8-16 ft as adults, and the price ranges from about $300-$600 all depending on quality. The kayaudi superdwarfs are much smaller than the jamps, and are a little more expensive. They average 5-8 ft with males being smaller, and LTCs cost about $550, where as CB ones are normally $800 or so... and just a warning, the dwarfs in general tend to be a little more flighty, but normally not as nippy... there are lots of small islands in Indonesia that have "dwarf" varieties, some of which have been imported to the US already (honey island superdwarfs, madu) and others that have not, but the Jampeas and the superdwarfs are the most common and most affordable... Currently breeders are working on breeding the dwarfs into the morphs that we already have in captivity, which results in dwarf/normal hybrids... it can be difficult to judge the overall size of one of these, but the "normal" siblings that are mixed with dwarf genetics can be cheaper than purebred dwarfs, and still a lot smaller than full-size retics...