I have stopped asking the last year or 2. They were going for $5-700 for a '64 set with the Peace or Morgan.
That sounds on the high end. I've seen several of these sell in the $200-$300 range, which seems like where the market is generally at (mine was in the lower end of that range, which I figured was a good deal).
I think you did super well. I could see a 70 selling for $700 on the 1964D. I got $350 on the resale, so you did very well.