i have a bunch of different sized skylights, mostly 2x4's, one 2x6, three 4x4's. one brand new 4x6 ($1000) one used 4x6 $250. 2x4's start at $20 an up, $40 for 4x4's. great for a shed or garage or for mini greenhouses!!! feel free to call or text me @ 250-713-7663