rongcp, as Falcon pointed out, there are several different version of the 300g XTP. Make sure you order the correct one when you do find the cheapest place.

I'm not much help as I buy mine locally. But I will throw in that I have used all 3 and by far the best performing in both accuracy and performance on game is the .430 version. It will take the (normally) green sabot instead of the black though. I'm not sure how familiar you are with MLs but wanted to give you a head's up just in case.

Good luck and let us know if you have anymore questions.