Weatherby is a good name, but the vangaurd is made by Howa.
NOT A BAD THING.....for a shooter, but howas are imported....new price is rather low compared to a rem 700 or savage so trade value will be lower.
The howa/vangaurd series are really good guns but dont have the NAME behind them....made in japan and of decent quality...its like a rock island 1911 compared to a colt.
I would expect a dealer to give you between $125-250 in trade on the gun depending on how "generous" your dealer is and rifle "condition"....new howa "middle of the line" guns sell for $400 new....weatherby adds some "flare" but dealers really dont sell them alot and they have NO aftermarket support...so tactical guys are looking elsewhere.
.270 is also a good caliber but doesnt have the cost appeal of.308 or .223 or even 30-06 to the masses so folks really are going to "buy" the vanguard as a plinking/beater rifle....and .270 is going to sit on a dealers shelf for a long time...so theyre not going to want to fuss with it.
The BSA scope will add nothing more than MAYBE $20(if lucky) to the trade value...theyre not very high on the scope totem pole...if not the bottom end....if you like it...take it off and keep it for another rifle.
Hate to be the bearer of truthful news....they are good guns if you wanna shoot them...just arent great for resale....my suggestion would be to save for the rest of the money.
I would say around 550 if it is the model with wood stock. I have a weatherby vanguard chambered in .257 wby mag and I have never shot it. I won it at a NRA banquet years ago. I always think about selling it or trading it but being .257 wby mag is not a real popular caliber I probably wouldn't get much for it.
McMillan, Manners, Bell & Carlson, Knoxx, Accurate Innovations, perhaps others, all inlet stocks for the Howa/Vanguard.
Roedale Precision offers an AICS chassis.
Howa recently redid their trigger, calling it HACT. Timney, Jard, Rifle Basix, perhaps others, offer replacement triggers.
Howa offers their own DBM, and offered a rebate for a free kit with a rifle purchase earlier this year. CDI and Pacific Tool and Gauge, perhaps others, offer their own AICS magazine DBM system as well.