You cannot "convert" a raw FAA TR with no experience. As has been said 500hrs on type would be the minimum.
I have heard though that a Canadian TR (thru Walts - ActiveAerospace? outfit in BC) could be valid with the JAA authorities in some countries (Belgium is one?) *without* conversion.
Sorry don't know anymore.
$11500 for an A320 TR seems awfully cheap though, and there can't be many US providers.