Bike Saddles
I made the mistake of just buying a well recommended saddle off of Amazon, and I could not ever get it adjusted right. I went in for another fitting at my LBS, and he told me that the saddle was completely wrong for me and promptly sold me a much more expensive saddle than the one I bought off of Amazon. The good news is that my LBS has a 30 day swap out / return policy (and the fitting was free because I bought a saddle from him). Maybe you could ask around and a shop near you will have a similar policy.