the value of any car is only what someone is willing to pay for it...

if it is worth 3k to you then.....

bought this 73 340 duster back in 2004 for about that price...

If you are new here, welcome to the site...........it is great, and you will get a lot from it. As mentioned above, it seemed that you already knew that you wanted the car, we are just offering our opinions for/against. It's ok on the Duster, in the long run you will probably make out fine, providing that you actually restore/finish it. Are you doing the work yourself? That would help offset the extra $$$......I know from my own experience that I sometimes pay more than they are worth, but in the long run I have never lost money. My '73 Roadrunner seemed high in 2004 at $1500.......it was a dry, rust free Oregon car. (see pic) Try finding one in that shape now, for that price! It's almost done, and since I did everything myself I'm sure that I made out well. My '68 Camaro SS 396 was only $1500 in 1990......guys at that time said I was nuts.........I KNOW I made out on that one, a true 396 car?? Please........a Superbee in the same shape as the Duster you are looking at.......$2500...........easy fix, new trunk, quarters...........an on and on..........the point is that if YOU feel it is a good buy, buy it........but do try to talk them down a little. That will not hurt! I believe time is on your side in this hobby, if you are a pack rat, like me. As time goes on, there are fewer and fewer unrestored musclecars, more and more rusty ones, and the prices are bound to go up on all examples. Just my

My bird now.........

I can promise you there is more rust than meets the eye. Yea I think 3K is too much.

Well, you asked for opinions and you SURE got them. By now you have probably already bought the car, or someone else has. A body cars are the last affordable , desireable Mopars out there. The 72-73 340 was still a performance engine and no less reliable with the cast crankshaft. Rusty sheetmetal is getting to be an acceptable evil in the remaining restoreable cars today. AMD sells plenty of metal for the A body cars. OH... the 70-71 fenders used a different side marker light than the 72-76 models, so a front clip swap would need marker light mods to match.
My Duster is a 74 model, with 1970 taillights and a 71-72 grille, hood and bumper. I built it to look like a 71 Duster 340 model for far less than an original. The 73-76 is still a nice looking car.