Quote Originally Posted by eesakiwi View Post
Microwaves are good for 1Kg of copper, so's a fridge, but you have to cut the compressor apart.

Considering, I'd go for microwaves first as they take up less space.
Keeping with the theme of the thread I say the microwaves could be stacked "inside" the fridges thus taking up less space to haul back to the shop. Killing two birds with one stone.