if u buying from resellers then just be careful and gain knowledge about how to spot a fake.

as why some AJs are expensive than others is:

1. Rare
2. sought after
3. color scheme
4. collabs

when i say rare what i mean is the OG stuff. some OG stuff can be sold for a hefty price.

as for 2 and 3, well some design will get sold out regardless of color and some color scheme is really in demand right now (eg. chicago colorwa)

and of course collabs. a dior aj1 is price so high right now i dont think normal ppl would ever be wearing ones.

so the question is... what AJ are u looking for? since AJ got so many variations and colors