Not a season ticket holder, but have tons of experience buying off the secondary market (and some selling too). Is there a particular reason you think you might be getting scammed?
Are you buying from a legit site (ticketmaster, nbatickets.com, stubhub, seatgeek, etc.)? If so you have nothing to worry about. But if you're trying to buy from some random guy off Craigslist or some other unregulated forum, you may have issues.
The secondary market price is the secondary market price, and it's mostly consistent across platforms, give or take a few % points, especially when the game is still several days out. If the seats you're looking to buy are all going for around $300 on all the legit sites, but someones offering them for $150 on Craigslist a week before the game, ya those are going to be fake.