Wow, that was a great buy even back then. A new Winchester Model 70 featherweight listed for $130.00 in my 1961 Shooter;'s Bible, today they are around $800 on
www.winchesterguns.com. So, when that 410 sold, it was about the price of seven model 70's.
At today's prices, seven of them would cost about $5,600 and we all know that isn't going to buy a Parker 410 in any grade. Either that was an extreamly great value back in the day or Parkers have done very well since then. Maybe both but I'll bet its more of the latter.