The license for GSA SEO Indexer has been sold.
Here are the remaining licenses which are still for sale:
1 license x ScrapeBox
ScrapeBox - The Swiss Army Knife of SEO!
Price - 50 USD
1 license x GSA Captcha Breaker
Captcha Breaker - solve captchas on your PC
Price - 100 USD
1 license x GSA Search Engine Ranker
Search Engine Ranker - fully automated seo backlink builder
Price - 70 USD