Mach I's come in many variations. Many engines, many options. You really need to figure out what you will and won't accept. For me I want how it came from factory (Marti Report), so any deviations have to be factored in a reduction in price. I prefer to have a loaded one as if I buy a bare bones Mach, I will aways be envious of loaded ones. At the same time, I kind of like a fastback with no options and even a 6cyl. that has had an easy life, and they are rare nowadays and simplicity to maintain is great. The most important thing is to learn about body conditions. A bargain usually isn't if it will need expensive repairs like rust or poor past body work etc. I don't mind some rust etc., but I want to know exactly what I'm dealing with. Giantpune didn't mention the 74's 78 Mach 1's that are available. They deserve respect also and are some of my favorites. I don't need the fastest car out there and if I do it would be a newer car not a vintage one. Also, there is a search engine that finds lots of cars on the internet websites, but I can't remember its name. I would start with it if possible. You can't read too much about what you plan on buying as knowledge is your best tool. I do google searches in a few different wordings when shopping for a type of car to learn as much as possible even if it takes over 40 hours