SP101 22lr

Are the SP101 22lr MDL05765 still in production?
I stumbled across one at the gun show yesterday, first one I've seen in quite awhile. They wanted $600 for it and suppose to be NIB but had no spent cartridge case or envelope. Do they do that for the 22s? Serial number is past the start number listed for 2015 as 577-310XX.
Jim H.

It seems Ruger no longer sends an empty case with new guns. The states that required it changed the rules.

That's about the right price, I love mine, like stated you get no fired cartridge anymore. If you get it just give it a good clean and lube then enjoy it!