NADA Says
{not sure what the 2010 R/T actually has}
IF Well optioned
the 2010 Challenger R/T Hemi {not a 6 banger} with 72k miles
retails for like really nice condition $17.5,
loaded, leather, sun roof, nav system etc.
for a ruff driver/low retail it's like $13k for the same car
most of the Aftermarket stuff
is to buyers or sellers taste, it's hard to put a realistic value on it,
many will say it decreases the resale values, that's for you to decide...
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{not sure what options your RR has, please don't take anything as an insult}
NADA says the 71 RR 383 4 bbl 300hp & a 4 speed with A/C
$12.6k low retail & a high for a great fully restored or really nice
value of $56k if really nice, an auto without A/C is like 25% lower
{I find the latter value $56k extremely high, maybe for a well optioned 4 speed &
maybe not for a green on green car, especially in a base model}
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The lower "retail" levels of both match somewhat
$13k for the 2010 Challenger R/T
& $12.6 for the 71 RR, the RR will be worth more in time {collectable}
the 2010 Challenger R/Tis going down as we speak {just another used car}
Middle of the road value for a nice RR is more than the 2010 Challenger R/T
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Opinions are like a--holes everyone has one !!
I personally Like the 71 RR better,
but that's me, it's your decision & your car, not mine...
Depends on what it is you want, you only live once
enjoy life while you can, don't sweat the small stuff,
you can get another of either...