Something smells slightly wrong here....... Usually the only time an antelope behaves like that is if it's been hand reared or perhaps has rabies or some other disease that makes it unusually aggressive............ Alternatively, it might just be that the animal is just very old and the owner thinks he's about ready to die of old age, and he wants someone to shoot it before that happens to give him an income from the animal.

The other issue you need to address is if 'PAC' means you can't have the trophy. - Which is usually part of the deal on a PAC animal. Turning it the other way round, if you can have the trophy, why is it a PAC animal and not a discounted trophy animal?

My advice would be that you clarify this a bit more........

Personally, I wouldn't touch an animal/offer like that with a barge pole, but it's your hunt, your money and your decision.