It could be. In my opinion, it depends on a few things:
1. Who are you getting it from?
2. What are its genetics?
3. Will it look as good in person as it does in the picture?
There are definitely tang geckos that are worth spending that much on. There are also really nice tang geckos for a fraction of that price (I have a lovely one that I got from Sasobek [Matt Baronak] for about $100).