Not to send discussion in a certain against the rules direction but the only place I've seen this available is a scammer (at least selectively, and dodgy at best even if they come through). It's possible you found it some place else, but since it just popped up in said place and everyone I know who's mentioned this compound found it there - I suspect that this stuff isn't even actually on the market. Wouldn't be surprised if the person in question sends a few people 5-APB or some mix of APBs touted as this stuff to get a few posts on places like this, and then just starts taking peoples money, if they don't go ahead and do that straight up.
I would highly advise you do not consume this without first having it lab tested. Seriously.
Even then, start with a < 0.5mg dose in case the potency is similar to the 25x-NBOMe series. I suspect more likely it would be inactive or a ridiculous dosage required much higher than that for 5-APB at least, but considering all the NBOMe compounds I can think of cause much more vasoconstriction and subsequent elevated blood pressure than most other drugs out there, you wouldn't want to take even a fraction too high a dose.
Be careful.