Easy to find, they higher than giraffe vajayjay though. You can get a 12 ga reasonable but the 28 Ga, holy mother of Goodness!!!! $2000 to $2500 for a really good one. I paid $750 for mine 5 years or so ago. BTW I have shot a whole lot of shotguns in my time, the RRL 28 is hands down is my most favored shotgun.
I have the exact same story. Picked up a BNIB .28 gauge for $750 at a gun show about 5-6 years ago. It is wonderfully well-made, super light, and points like an extension of my arm. No other shotgun I have ever had even comes close....