I have used these guys twice now
http://www.t-shirtwholesaler.com/
I usually get the Gildan 5.3oz 100% cotton for the adults.... I ordered 17 shirts for 55 bucks (that is with a 10.00 off coupon) then 12 to ship...
I like them as I needed sizes 3t-XXL....GOOGLE for coupons first just in case they are offering some....if you call, ask too..
Good luck
HH