...by what criteria do you define "Entry Level" for SxS's?
For someone of the Parker persuasion the Trojan is "entry level." A basic 12-bore SxS with 28- or 30-inch M&F bbls, pistol grip, black rubber butt plate, double triggers, made since 1912 and best after the mid-1920s. But let's not confuse an entry level shooter with a collector's item....
An unfired "NIB" Trojan 12-bore (with box and tags) sold at Julia's two years ago for $10,350 with "juice" (15% buyer's premium). The gavel price of $9,000 minus 15% seller's juice was $7,650 minus 1% insurance and another 1% shipping (say, $180), which netted seller, say, $7,470, being a buyer/seller spread of roughly $2,880...or at least three times the price of a decent Trojan shooter. (The buyer paid more than 12 times the price of the below mentioned Parker Trojan shooter...
C'est la vie!)
I bought a sound, unaltered, fully-functional, used-but-not-abused, basic 1920s Trojan 12-bore shooter at the 2008 Vintage Cup from a dealer for $850--ENTRY LEVEL--which now resides in my son's gun cabinet in VA, where we shoot trap out behind the barn, on occasion.
There are other good American-made guns besides Parkers (but not for me). I think the entry level test for old men whose minds are made-up on a particular maker ought to be: What model of my favorite gun would be a good starter/entry level gift to a son or daughter to perpetuate the family tradition.
For a Parker person the answer is a fairly priced Trojan grade according to the standard 12-bore template: about 7 1/2 to 7 3/4 pounds, pistol grip, black rubber butt plate ( or decent pad), modified and full chokes, double triggers, splinter fore-end and, as a shooter, the later made the better (Trojans were made from 1912 till 1938). EDM