that is what he would offer,actual prices differ for about 2 packs,depending on the card
examples-magnezone prime-minimum price of 5 packs,goes up to 7
collector-2-4 max,
rare candy,minimum of 3
some people try to scam you on public offers by offering 1 pack for valuable cards like rare candy,collector,zekrom,reshiram etc, and then they trade it for more packs,but i think nowadays,especially on 8th february,u will be able to get the cards u need cheaper especially because of the starting hype from the online cards of ND.if you offer ND packs,you will get them cheaper.
i would try by posting my wants here though and offering codes/packs for them