Originally Posted by
bananapointjunkie
I dont travel much for business so do not get the opportunity to collect miles. I do collect Membership Rewards points on my AMEX card and almost have enough points for a business class ticket but still require more points.
How many is that exactly? Are you looking at pay with points or are you considering transferng to one of MR's partners and booking from there? (Transfering to a partner and booking an award is almost certainly a better deal.)
Originally Posted by
bananapointjunkie
I was wondering if there exists an agency that actually specialize in selling various FFP air miles so that i can shift my AMEX MR points to an FFP along with the ones that i purchase? (if that is possible)

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Absent an especially good sale, most opportunities to purchase miles are woefully overpriced.