I understand your concerns.
First point, Why do i want OSRS GP?
I will sell that OSRS GP to large GP selling/buying websites afterwards. This heavily reduces my risks of being scammed. Arguably it is already close to zero, as i can recover my own account if absolutely necessary, but still, it...
I play on PC!
7 Champion 1 crates
3 Champion 2 crates
2 Champion 3 crates
Buying single crates is not possible. You have to buy all of them.
If you have some vouches/are somewhat trusted, i will go first no problem.
The price is not negotiable.
I get that it is very hard to trust me. I don't have an answer for that. You either do or don't.
I understand that 99% of the visitors will think the same as you, but i hope that the 1% gives me a chance.