Some of you senior citizen may remember the 'cheap' exotic gun ads in all the magazines back in the 60's...One I have never forgotten was for a SKI/Sled-Runner Finnish anti-tank rifle in 20mm. It looked like a cross between a Bren-Gun and a Boyz Bolt Action. The text had a cartoon image of a Bugs Bunny way out in the distance, with the text saying "Kill that Jackrabbit at 2000 yards, with a hit or even a near miss !".
I recall the ammo going for a dollar a round, but don't recall how much the gun sold for (Mail order coupons in the magazines had the sale prices) .. This would have been in the early 1960's (pre-68 ban)