My personal opinion is not worth it! Even there are plenty of .com, .net, .org keyword domains left out! Then why would someone opt for .pe domains? May be few people from Peru might be interested. But, it could be difficult to put it up for the global audience!
If your website is only target Peru as your niche market , then no doubt to go with .pe and try to rank better as a local peru website. If no , then is better to use back .com domain extension. It depend your niche . Your sales , your visitors, your niche is in peru then its worth to go with .pe domain name