Are there other ways (like eBay) to purchase Nitro Pro online?

Unless purchased directly through Nitro Sales or authorized reseller partners, Nitro is only available for purchase online at GoNitro.com. Please note that Nitro Software does not sell its products on online marketplaces, such as eBay. All copies that are available on eBay (or similar marketplaces) are pirated and unsupported and are likely to contain trojan horses and viruses. We have received many complaints regarding these cracked versions. The only official place to purchase Nitro’s award-winning software is directly through Nitro’s online store here