Welcome to Hermes! Choosing and buying your first Hermes bag is exciting but can also be overwhelming with the plethora of choices (although not usually at the boutiques lol).
The question "is it worth it?" is very subjective though. What I may consider a fantastic deal may not appeal to others so perhaps what you can do as a start is look through the threads of Kellys here and see which colors you like, which size works for your lifestyle (32 is a great size for a first Kelly!) and determine how you'd like to use your Kelly (as a casual bag for daily use? something that can take you to evening? in which case a 28 might work better) what colors go best with your wardrobe, etc....
Once you have a good idea of what you are looking for and how this would fit your lifestyle, then you can research and see how similar bags have been sold on Ebay, for example.
If you're lucky there are some amazing deals to be found (I know someone who found a vintage black croc Kelly through a private seller that was in great condition for about $10,000) but that takes incredible luck and timing.
For what it's worth, I think the bag you posted is quite lovely and I like the contrast stitching. If it's in excellent condition, it's not a bad price.
But unless it's an amazing deal (like the croc Kelly example I gave) or a super RARE find, I think it may be quite difficult to get a general consensus on whether this bag "is worth it".