Flat rate domain broker?
 

I have about 100 domains I want to email/call the whois owner about to try and snag the best possible price. Does anyone know any domain brokers that can do this for a flat rate per domain purchased? Some of these are only worth $50-$100 and I feel paying a percentage would cause conflict of interest.

Thinking you would want to start with a base amount for x domains sold, moves up from there with a premium percentage bonus for overall production.