###You can reward the answer with a another bounty You do have the option to offer another bounty on the question, then manually award it to the answer you feel deserved the reward. There's even a bounty reason for this purpose:

If you decide to go this route, be aware that each subsequent bounty offered on a question must be double your last bounty offer.

Depending on how valuable the answer was to you, this may be a fitting way to thank the poster for their effort. Remember, your cost is only some free Internet points!

You can reward the answer with a another bounty

You do have the option to offer another bounty on the question, then manually award it to the answer you feel deserved the reward. There's even a bounty reason for this purpose:

If you decide to go this route, be aware that each subsequent bounty offered on a question must be double your last bounty offer.

Depending on how valuable the answer was to you, this may be a fitting way to thank the poster for their effort. Remember, your cost is only some free Internet points!