I have been looking for a while now, most told me "No matter what the severity of your case, Invisalign charge is the same for everyone". When looking online it seems to say "cost varies per case", but yet most gave me a cost before even looking in my mouth. I have received quotes from $4200-6800. HUGE differences (Only 1 actually quoted specific to me). What is the REAL answer? Who do I trust? Is it bad to go with the cheapest quote for this kind of treatment?