Just as everyone has said, test it out! I get a number of wigs off eBay but I don't really trust most of them when they say heat resistant.
Also, I wouldn't really recommend treating a wig like normal hair that you can just straighten and curl on a whim, at least not that one since even if it is heat resistant I wouldn't want to necessarily remove the natural curl baked into it since it is very difficult to bring a nice curl back into a wig from what I've seen, personally. Repeatedly styling it with heat could also be a risky move.
Of course if the test patch works for you, you just do whatever the heck ya want to it, I merely offer cautious advice since I myself am overly cautious with my wigs.
If you want properly heat resistant wigs I recommend Arda Wigs as they advertise using Hiperlon fiber which is one of the more heat resistant fiber types and a LOT of Arda customers restyle their wigs or straighten them often.