[Lordstan]

It is an interesting question, but there is another part that factors in.
I think the answer to your question is definitely yes, more tickets would be sold, but would the amount of money raised be enough to allow Graig to do the painting? This raffle is a way for someone interested in getting a painting from Graig get one for much less than the usual commission rate, but it is not a charity raffle like St Jude's or a mega-dream raffle like the powerball. Both of those raffles will proceed forward regardless of how many people buy tickets. If we don't reach 250 tickets @$20 per($5K), then there is no raffle. At $2 per chance, that would mean we would need to sell 2500 chances.
I am sure that more tickets would sell, but am not sure if it would reach that threshold.