A quote from the Marlin owners forum RE the Marlin 2000L Biathlon Rifle:
"The reason they were not really popular is they are single shot rifles, and the price was considered to be more than the "Marlin crowd" wanted to pay for a one shooter.............The other crowd, the "Anshutz" crowd would anty up the needed additional $$ for the Anshutz, as they considered it a better, more competitive rifle.
The Marlin 2000L could be modified into a clip fed repeater by the addition of the Biathlon kit.............I did just that, with my 2000L.................but I have the ability to return it to single feed for Small Bore events.
The 2000L's were hand built and fitted. The triggers are some of the best you'll find on ANY comp rifle, and the barrels were hand selected Air Gaged bores with bentz type target chambers........... As good as the 2000L's were, winning in Small Bore Competition is as much about money and equipment as it is skill...............Even a good Model 52C or D Winchester is considered mediocre today.
After production was stopped on the 2000L's , the only Marlin rifle available for similar accuracy was the 880SQ............and that's still the case today.
If you can find a complete 2000L for sale with the original Lyman/Williams or Anshutz sights in good condition, I think you'll be approaching the $600.00 figure, and worth every penny, if you're searching for accuracy."