5 Beauty Treatments That Are Expensive But Totally Worth It

4. Lash extensions 

Insider Monkey Score: 5 

Eyelash extensions are one of the beauty treatments that are expensive but totally worth it, with costs up to $300, varying by location and type of extensions. They involve applying synthetic lashes to natural ones, lasting up to six weeks with proper care. Aftercare is vital for longevity, avoiding oil-based products, and careful makeup handling. Complete sets range from $80 to $400, with touch-up sessions recommended every two to three weeks, costing about half of the complete set.