When you say it's good engagment

Hello im in the fitness and car niche and im looking for good pages to buy shoutouts from and i don't want to buy from page that have maybe many fake follower so i see some pages with 90k follower get 200 like average so just want to know when you say this is good page with real follower and good engagement how many eng it should get 10% ...5% ??

You can tell if you go to audit there followers manually. don't recall a site being accurate in measuring follower activity on Instagram accounts, though some measure the total engagement of the account. You'd ned to request impressions, comments, likes, and clicks ratio from each seller before you make your choice. As for pricing, quality is more expensive, but be sure it is legit and not some noob trying to get a quick buck.

Thanks any other suggestion ?

I usually look for ones that have 10%+ engagement. Followers to like ratio.