They run between $1,500 and $1,600 these days.
Here's quick run down on "selling" prices of various Valmets.
71 .223 $1,000
76 .223 fixed stock $1,200
76 .223 tube folder $1,400
76 .308 fixed stock $1,450
76 .308 tube folder $1,800
76 7.62x39 fixed $2,500
76 7.62x39 folder $2,900
62 7.62x39 $2,400
78 .223 $1,400
78 7.62x39 $1,650
78 .308 $1,500
82 .223 $1,250
This is just my opinion of what I have bought and sold over the years. The 7.62x39 Valmets are the most rare with the 76 folder topping the chart. All of the Valmets are very nice guns, however the 71 is really a bottem feeder in the lineup. The action and workmanship on the 71's is quite bit lower than the rest of the guns. I would suggest spending a couple of extra dollars and getting a 76, rather than a 71. Pricing on the 82 is probably the most wide spread ranging from $1,200 to $2,000+ but most knowledgable Valmet owners don't like them. The 82 is a rare gun, but it is far from scarce, since they tend to change hands at a rapid rate. On the Valmet board the other day, it was unanimously agreed that the 82 was the worst Valmet ever made.