Things change over time ....and Weatherby isn't the same quality gun it was 30yrs ago unfortunately.
The used market pricing .....is a very good indication of the long term quality of most guns / desireability on the used market. If the Weatherby was as highly thought of as a Browning 525 - on the used market - it would retain its value.
Having said that ( and I'm a big Browning fan - own over a dozen ) but the 525 and 625, while beautiful guns, have a lot of fit issues for many shooters - too much drop at heel, too much drop at comb ......and in general, the 525 series, does not do very well on the used market / compared to the XS Skeet model especially - which will fit a lot of shooters especially if it has the adj comb.