It is not so big problem make documents (Cites export permit, veterinary export certificate) but it is cost something. Than you need calculate with shipping price itself. I am afraid that by shipping from Europe (I am from Europe so have no idea about shipping cost from USA I assume they will be lower) it will cost well over $500, probably it will be closer to 1000. Price for 1 and 100 chameleons will be not that different.
Moreover I expect that no one exporter will start without partial advance payment because applying for permits cost something. I do not know if you need import CITES permit (you need know your law) for II annex animals it is not necessary.
I believe for veileds, pardalis,lateralis, jacsonii etc export documents are no problem, for some "a bit uncertain" origin species (f.e South african Bradypodions, parsonii, etc) although they can be generations bred in Europe export permit can be difficult problem.