I have owned one for many years. The Browning HQ is just down the Mtn, from me. Those rifles sold for a little of nothing during the 1980s when they were dropped from the Browning line.
If you want a shooter, I would buy some thing else. If you want it for a Browning collection it still sounds a bit high to me.
It is your money so if you buy it to shoot use a very thick patch and ball combo. most of these things need a .495 ball with a .024 patch to shoot at all. I had the funcky crown removed by cutting the barrel back 2" and using a better crown that did help. The stock channel was week and the breech hook did not fit. I had it glassed that helped.
Browing must of used a number of different barrels as the sales failed. It as Forest Gump says about the candy you just don't know what you are going to get.
These guns were sold off cheap. I think every one around here owned one. Most were traded off or sold.
For that kind of money I would look at a TVM rifle or a cheaper Lyman Plains rifle. If its a shooter you want. Browning has no parts or repair for these things, so you are on your own. All the parts were actioned off 10 years ago in Ogden, Ut. for scrap prices.