I have seen these posters at most petshops installed in a frame next to the tarantula's display section, so that 'would-be-buyers' would be able to decide what they would like to buy, or to order.
I feel that a person buying a Tarantula should know the Latin name, hell if there was a petshop only selling Avicularia species with only the common names, I could just imagine the identification crises they would have seeing this is a list of Avicularia - Latin names only: "Feel free to try and get all the common names if you REALLY have nothing to do

"
Avicularia affinis
Avicularia alticeps
Avicularia ancylochira
Avicularia anthracina
Avicularia arabica
Avicularia aurantiaca
Avicularia avicularia
Avicularia aymara
Avicularia azuraklaasi
Avicularia bicegoi
Avicularia braunshauseni
Avicularia caesia
Avicularia cuminami
Avicularia detrita
Avicularia diversipes
Avicularia doleschalli
Avicularia exilis
Avicularia fasciculata
Avicularia gamba
Avicularia geroldi
Avicularia glauca
Avicularia gracilis
Avicularia guyana
Avicularia hirschii
Avicularia hirsuta
Avicularia holmbergi
Avicularia huriana
Avicularia juruensis
Avicularia laeta
Avicularia leporina
Avicularia metallica
Avicularia minatrix
Avicularia nigrotaeniata
Avicularia ochracea
Avicularia palmicola
Avicularia panamensis
Avicularia parva
Avicularia plantaris
Avicularia pulchra
Avicularia purpurea
Avicularia rapax
Avicularia recifiensis
Avicularia rufa
Avicularia soratae
Avicularia subvulpina
Avicularia surinamensis
Avicularia taunayi
Avicularia tigrina
Avicularia ulrichea
Avicularia urticans
Avicularia velutina
Avicularia versicolor
Avicularia walckenaeri
Avicularia rutilans
Avicularia sooretama
"information gathered from
exoticfauna.com/tarantulabibliography/index.html
"
That is why I have never bought a tarantula from a petshop in ages. The last petshop swore they sold "Bolivian bird-eaters" when asked what the Scientific/ Latin name was, I was told it is a L.klugi.

It's the same day I learnt why I never buy tarantulas from a petshop. There was a molt in the Vivarium and I wanted to sex the tarantula and told him if he wouldn't mind me having a look at the molt, to see if it is a male or female. He took the molt out, picked it up and just stared at it, before I could say stop the molt was in the bin "he flicked out his lighter" got the L.klugi or hell knows what up against the glass and using the lighter sexed her "according to him" trying not to laugh was the hardest part in my entire life.

I knew the guy very well and this was the first time I wondered if he really knew enough about tarantulas. Other than the sexing incident, I have to say this petshop is extremely clean, they look after their critters, fish, pets and exotics. All the animals are WELL looked after, but some staff still need to learn more about tarantulas
PS: If I knew a person was using my photo's/images or designs without my consent then I would sure as hell start a legal action, seeing I have enough people to help me with legal matters