Well... depends if you can do what i call "Over take other people" marketing
Aka Adding listings to ebay every 20seconds with some Thing that lets you Replicar the auctions 500 times or w/e... Make sure your phones are the only place people know they got it from...
it works out well
EVEN though i ant sold Phones i sold Chewing gum
but it worked the same for me i Over sold everyone else offering best prices but wernt really best for them it was best for me
All In all Iff you can offord 1000 phones
i wouldnot bother getting it in all one model maybe top 5 models 200 each?