I can tell you for sure if they are legit with better photos of markings. As previous poster stated they are one of the most faked Bayonets out there. The reissue is clearly marked as such. It is dated 1999 on the Ricasso and was commissioned by Doug Bowser.
They are not a rare bayonet. In fact they are the 3rd most common FinnishBayonet. However the demand is high because there were 110,000+ M39 rifles made, but only 10,000 M/39 Bayonets made, of which 8,200 survived. Everyone wants a M/39 bayonet for their M/39 rifle, but they are only correct for M/39 Sky Rifles. VKT and SAKO M/39 the correct bayonet would be M/27, M/29, or M/35 Army Bayonets for Army Rifle. M/39 Bayonets are Civil Guard Bayonets for Civil Guard Rifles.