I shop the used racks.
I bought a Browning B-2000 for under $200 and took it apart re- assembled it the proper way and have a knock around 12 ga semi auto.
I bought a Remington 1100 where the Frame, stock and fore end all looked brand new the barrell had surface rust and from what I can tell it was a 30" full that was cut down to 25.5" for under $300 out the door.
Next week I had the gun shop order me a 26" screw in choke ribed barrel for $300 and now have a like new 1100 for under $600.
I am still kicking my self for letting an 11/87 that was about $350 in the used rack go. It was a little beat up and missing all but the choke in it but Chokes are easy to get, same with wood or plastic stocks for the remington stuff and cheap.
If you find a current made gun in the used rack and it is 90% of what you want. Get it and change the other parts you do not like.
Barrels, choke tubes, stocks, Camo tape, leaf cut outs, and cans of spray paint can change a gun drasticly. As long as the action seems smooth in the store not a problem. most guns will be dirty in the racks. guys shoot them andn then sell them. they do not shoot them, clean them and drag them to the gun shop to be sold.