I bought a similarly equiped 1970 Challenger a year ago for $16k usd. But the economy has continued it's downward trend since then so the same car would likely only be worth $14k today! While this car has great "bling" being red & white, it's a 1973 model year which is worth less (please don't read "worthless")! It comes down to how much you really like 1973 Challengers (my first was a 1973, then a 1974 and now a 1970) and your ability to do any of the work you want done as it will likely be too expensive to pay hired help. And keep in mind this really is just a HOBBY, as in something for you and dad to enjoy together because you will likely only recoup 50 cents on every dollar spent. In my book, it's maybe an $8k usd car as it sits.
Best, Charlie
70 Challenger
69 Camaro RS