The joke to me is a two triggered model 21 value. If you have one and want to sell it, then a dealer they will try to tell you that two triggers are harder to sell so the want to discount the price 10% or more. Then if they have one for sale they claim its a rare version and then ask for a 10% or more premium.
I like two triggers and have zero problem going from two to one and back. Some can not use both or struggle for a bit getting used to one after using the other. For that matter I also can pump a pump gun like I was still a kid but the first couple shots with a semi automatic, after shooting a pump gun, can test the fit of the fore end.
Life is so much fun with a variety.