Good evening to you!! The Browning Classic High Grade 20 gauge shotgun has been discontinued unfortunately. I can tell you this about it:
Gauge
20
Chamber Length
3"
Barrel Length
28"
Overall Length
48 1/4"
Length of Pull
14 1/4"
Drop at Comb
1 3/4"
Drop at Heel
2 1/4"
Weight
6 lbs 14 oz
Magazine Capacity
4, 2 3/4" shells
Rib Width
1/4"
Stock Finish
Gloss
Chokes Included
Full, Modified, Improved Cylinder
Chamber Finish
Chrome Plated Chamber
Barrel Material
Steel
Trigger Guard Engraving
None
You may want to visit an auction site that these other gentlemen have suggested. Hope this helps. Have a good rest of your weekend.
🇺🇸🇺🇸 'Merica' 🇺🇸🇺🇸

So information on purchasing, I'd checkout a site called Gunbr0ker where sellers list Rare and HTF firearms & accessories. Other than buying info. Here's some info on the model itself.
The Browning Gold Classic High Grade 20 gauge is a rare, limited-edition semi-automatic shotgun (circa 2003) featuring a 26-inch barrel, 3-inch chamber, high-gloss walnut stock, and a nickel-plated receiver with intricate engraving. It is designed for fast, reliable, and comfortable shooting.
Key Features of the Gold Classic High Grade (20 Gauge):
Production & Rarity: Known for high-grade wood and specialized engraving, often making them collectible items.
Action: Gas-operated semi-automatic, reducing felt recoil.
Receiver: Nickel-plated, often adorned with special engraving, differing from the standard black anodized receiver.
Barrel: Typically 26-inch, equipped with a vent rib and Invector screw-in choke system.
Stock: High-gloss walnut, often featuring a 14.25-inch length of pull.

Hi Jack and welcome. I would search Gun(6)roker.com - just replace the (6) with b and Guns International as hard to find firearms are often sold by small shops and private individuals: gunsinternational.com/ - Cheers and stay safe!