Advice on a G1 IGA Ramjet MISB

Well seeing as this is my first post I think before I start I should say hello and introduce myself
My name is Ben and I collect 70's and 80's toys mostly Star Wars and other 3.75" figures ranging from Black Hole, Buck Rogers Indiana Jones and Ghostbusters.
I have always loved G1 transformers but have never felt happy buying 1 from the net, I prefer to actually see and hold what i'm buying especially when I know very little about the subject. Anyway I have gone and purchased this:

I'm sure you all know but its a IGA G1 Ramjet graded by UKG with an overall grade of 85. I love it and think its fantastic but I'd like to know more it i.e is it different to the Hasbro version and if so why? How rare are they? and obviously what kinda money is he worth? I am more than happy with what I paid but would like to put that value into perspective.
Cheers
Ben

My name is Ben and I collect 70's and 80's toys mostly Star Wars and other 3.75" figures ranging from Black Hole, Buck Rogers Indiana Jones and Ghostbusters.
I have always loved G1 transformers but have never felt happy buying 1 from the net, I prefer to actually see and hold what i'm buying especially when I know very little about the subject. Anyway I have gone and purchased this:

I'm sure you all know but its a IGA G1 Ramjet graded by UKG with an overall grade of 85. I love it and think its fantastic but I'd like to know more it i.e is it different to the Hasbro version and if so why? How rare are they? and obviously what kinda money is he worth? I am more than happy with what I paid but would like to put that value into perspective.
Cheers
Ben