^Did you buy it off the AMC website?. Regardless of what you paid you've made a good investment, it'll only appreciate over time.
There's a serious resurgence going on with 60's - 70's Aussie muscle cars right now, some ridiculous prices are not only being asked, they're getting it. Phase 3 Shakers are still the benchmark but Torana's and Monaro's are cashing in big time now too. Good A9X's and 308 or 327 Monaro's are pulling around 200k, L34's and 350 Monaro's are even higher and owners are mainly taking them to auction now (smart move).