Some recent antivirus auctions on eBay:

Avast Premier 2018 + Avast Cleanup Premium - License for 10 Years

$12.90 End Date: Wednesday Apr-25-2018 11:19:18 PDT Buy It Now for only: $12.90 Buy It Now | Add to watch list

Avast Premier 2018 + Avast Cleanup Premium - License for 5 Years

$7.00 End Date: Wednesday Apr-25-2018 11:19:18 PDT Buy It Now for only: $7.00 Buy It Now | Add to watch list

Avast Premier 2018 + Avast Cleanup Premium - License for 10 Years

$12.90 End Date: Wednesday Apr-25-2018 11:19:18 PDT Buy It Now for only: $12.90 Buy It Now | Add to watch list