I'm thinking about backing out on buying some thing that I already agreed to get.
Why would you not buy something you agreed to buy?
The price seems pretty steep.
It sounds like you are being wishy-washy. You made a commitment and you should honor that commitment.
I just wanted to see it first if it's worth it. Isn't that what some people do? Just looking at an object will tell you if it's worth the price.
Sure, it's reasonable to make sure that what you're getting is a good quality, but you shouldn't back out on your commitment to buy it. If you agreed to get something and then you back out, the person who made the commitment to will be upset with you.