I say go for it!!! Here’s where I got mine a while back:
http://www.oswaltsmustangs.com/index.htm
He seems to have a good eye for 69/70 models and usually has a few in his show room. Let him know what your looking for, he’s always on the lookout for classic Mustangs. I’ve run into him at several shows since then and we always have nice conversations about Mustangs. Mine had great paint and a newly rebuilt 351C-4V. What attracted me to my particular car was it looks totally stock but has a few retro-mods like a 5-speed and rack & pinion steering. Since buying it, I’ve done lots of little thinks like replacing chrome and trim pieces as well as updating the suspension with gas shocks, bigger sway bars, and new springs. I had a new 1970 Mustang back in 1970 and now I’m trying to make my 1970 Mach 1 as new as that one was only more modern by today’s standards.

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Bill
1970 Mach 1 w/351C-4V, Shakerhood and 5-speed
2003 Mach 1 w/281-4 Valve, Shakerhood, and 5-speed