Man, New England just must be really expensive. It is near impossible to find any sound, healthy, sane horse under-10-year-old horse for less than $1500 where I'm from. Either they are badly misrepresented (and end up lame later) or there's some issue (bucking? Rearing? Biting? Kicking? Take your pick). I even scour rescue situations and ads online and at the local hay/feed co-op.
That being said, I do now have my heart set on a mustang, which are also few and far between in New England.
I see so many ads for horses in the west for $600 and people negotiate DOWN on the price. For me that would be a STEAL!... like, this horse must be dying, it's $600?