Having just noticed the 'ridiculous' thread, I thought I'd go ahead and ask people what items they'd like to see be added to the BMAH either soon or come Legion's release because there's some stuff I just can't be bothered.
Personally, I'd love to see the following added:
.Time-Lost Proto Drake
.Dormus' camel (Again, I haven't seen one figurine)
.MoP world boss mounts seeing as they still haven't put them on 15-min respawn rates
.Zandalari Warbrginer direhorns
.Kor'kron Juggernaut
.Phosphorescent Stone Drake
.All other TCG mounts
.The other TCG pets
What do you want to see?