As mentioned my son has discovered Generation one and subquently has favourites he wants. But really wants his transformers as close to Generation one as possible

He has got tru mp10 but I ain't buying many other masterpieces for him for a little bit. Need some help on some slightly less expensive ones. However need to look somewhat like gen 1 counterparts and relatively scale with mp 10

His faves atm are

Grimlock
Inferno
Bumblebee
Soundwave
Sea pray
Skyfire (loves loves loves skyfire)
Ironhide
Ratchet
Ravage
Jazz
Omega supreme
Preceptor (want preceptor for Xmas? Wtf? Haha)

Any help would great guys. My boy is hooked!