A great domain name for an email list building or lead generation service, or social selling app for other people’s things similar to LetGo. The term “Opt” could refer to either “opt-in” for opt in or double opt in newsletter confirmations, or could also be used as an abbreviation for a phrase, like “other people’s things”, which would be perfect for a used goods marketplace selling app.
Why else you need this domain:
Memorable: buyopt.com is easy to remember.
Great extension: Uses the .com extension.
Short: buyopt is 15 characters or less.