In having worn and broken a sweat in a wide variety of fitness apparel options as a product tester and also in my working experience as a yoga teacher, group fitness instructor and personal trainer, I personally have found that items worth splurging a little extra on include athletic pants, sneakers, sports bras and tank tops. On the other hand, items like jackets, shirts and shorts you can save money on, as they have some great options for very affordable prices.
Three great tips for being a savvy, yet thrifty shopper for fitness apparel are-
1.) Browse outlet stores (Nike, for example, has some great outlet stores with high quality apparel at a reduced price)
2.) Search for sales (many apparel companies will host great sales throughout the year on last season's apparel lines to make room for next season's stock)
3.) Keep an eye out for fitness apparel where you may least expect it (at places like Costco, Old Navy and Target, for example)