Magic Mike, I drive a truck and do a lil' pallet recycling. I do know the average 4 way pallet to weigh roughly 43 lbs. We also use gaylords for shipping some air freight items. I believe they are roughly 13 lbs. Obviously, as you stated this could vary. I would add a little bit more weight for "chep" brand pallets, as they are made from 4x4's they're usually the blue painted ones. I would +/- 10% either way of say 55 lbs.