My quilting group just made a quilt for a fund raiser. We sold the tickets for $1 a piece or 10 for $5... our thought, we wanted to get at least $5 if possible. Anyone will spend $1 for a ticket, but if you can get twice as many for $5, almost everyone will spend a least $5. It worked out really well, we make over $1000! It's not about how many tickets you sell, it's about how you can make the most money!
Good Luck with whatever you decide!